How to design Haunted House Animation

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Dr.MohitBansal,Canada,Teacher
Published Date:26-10-2017
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Haunted House – Modeling of the Scene Welcome to the scary project In this chapter, we will model a haunted house that we will texture and render in the future chapters. You will use the modeling techniques that we have already seen in the previous chapters and learn some new techniques using some useful modie fi rs and time-saving tools. Moreover, you will learn how to correctly organize your scenes by grouping objects and placing elements in layers. Now that you have more experience with Blender, we aren't going to show you all the steps in detail but rather describe the key points of the process. If you have any difc fi ulties, you can always go back to Chapter 2, Robot Toy – Modeling of an Object, and Chapter 4, Alien Character – Creating a Proper Topology and Transferring the Sculpt Details, in order to review some of the modeling techniques. Let's start our scene In this chapter, the following topics will be covered: • Modeling on scale • Blocking the house • Advance modeling tools • Modeling with curves • Organizing the scene 123 Haunted House – Modeling of the Scene The final haunted house should look like the following screenshot: Blocking the house Before going into detail, we will start by testing different shapes in order to create the concept of our house. It is like a 3D sketch. Working with a scale In order to create our haunted house and its environment, we need to work with a real world scale. Indeed, when you are working on objects, such as buildings, where the scale matters, it is important to remember to adjust the units of measurement of Blender. Blender uses, basically, its own unit of measure: the Blender units that correspond to a fictitious unit of measure. You aren't going to encounter Blender units in the real world. There are two other unit systems of measurement in Blender that you can use: the metric system and the imperial system. We prefer the metric system. For this, go to the Properties panel on the right-hand side of the user interface under Outliner (in the default layout). In the Scene tab, you will find the Units tab. Choose Metric and Degrees. 124 Chapter 5 The metric system allows us to work in kilometers (km), meters (m), centimeters (cm), millimeters (mm), and micrometers (μm). Let's choose meters in our case. For this, we set the Scale value to 1.000. A value of 0.1 would make us work in centimeters. To know the size of your 3D models, in the Object Mode, you can look at their size in the Transform tab on the right-hand side panel of the 3D viewport (N). This information is also given in the Dimensions section for the x, y, and z axes. You can then display the size of the selected edges. In the Edit Mode, under the Transform tab, go to the Mesh Display tab, and check the Edge Info Length option. If you want to measure something, Blender gives you a ruler under the Grease Pencil tab in the left 3D view panel (T). To use this, simply click on the Rule/Protractor button and drag it in the 3D view. Be careful to always apply your scale and move or rotate the transformation of your objects when you manipulate them in the Object Mode. To do this, we open the Apply menu (Ctrl + A) and select Rotation and scale. It is important to avoid involuntary deformations after this. Blocking the bases of the house To make this house, we don't start from concept art but from an idea and a few references found on the internet. It is very important during any creation to spend a little time documenting to confront the different possibilities of shapes and styles. We need to see what has been done previously and be informed enough to be precise in our work. 125 Haunted House – Modeling of the Scene As we are not completely sure of the form as a whole, we will adopt a method that involves testing and quickly developing ideas with simple forms. This method is called Blocking. This is done as follows: 1. We will begin the modeling by adding a cube at the center of a new scene (Shift + A and select Mesh Cube), which will represent the central part of the house. 2. In the Object Mode, we will adjust the size in the Transform tab to have something realistic. It is an imposing house, so we will set 7 m on the z axis, 7 m on the x axis, and 8.5 m on the y axis. 3. In the Object Mode, let's duplicate our cube (Shift + D) in order to make the terrace. So we will scale it to a height of 1.26 m, then we will place it at the base of our haunted house under the main block previously created. 4. The terrace is not completely cubic. We will add two edge loops and an extrusion to the front, which is less wide (on the x axis) than the main block. It is necessary that this terrace is large enough to be credible, so we will create a passage of at least two meters wide. It is not necessary to be very accurate for the moment, but be aware of your measures, and remember to apply the transformations when you switch back to the Object Mode (refer to step 1 in the following screenshot). 5. To improve the general shape of our house a little, we will add a new cube that fits in the front of the central part of the house, centered on the x axis. The height of this cube exceeds the height of the other cube by one third. The rest is hidden in the central block. It has a square base, and it is higher than the main block by about 45 cm (refer to step 2 of the following screenshot). 126 Chapter 5 6. Likewise, on the rear part, we will duplicate our front block (Shift + D) and move it to the other side on the y axis. This block is lower than the main block. Its size is 4.7 m on the x axis, 1.67 m on the y axis, and 5.3 m on the z axis. Now we have our basic volumes. We can now make the roof that is composed of several parts; one for each block. This is done as follows: 1. We will begin with the roof of the front block by adding a new cube (press Shift + A, and select Mesh Cube). We need to adjust its size to be larger on the x and y axis. 2. We will move down the top face to flatten it. It is the bottom part of this section of the roof. 3. Then we will do an inset (I) and an extrude (E) to the top. We will adjust the scale of the top, and then we will add two extrusions (E) to make the top thicker and finish the shape (refer to step 4 of the following screenshot). 4. We will duplicate this part of the roof (Shift + D), and we will place it on the rear half of the central block. We will scale it on the x axis (press S + X) in order to have the same width as the central block. This is also lower than the roof of the front part, so we will also scale it on the z axis (S + Z) (refer to step 4 of the following screenshot). 5. In the same way, we will make another roof that covers the front portion of the terrace. It will be supported by pillars. We will again duplicate our roof that is cut in half, and we will adjust it according to the dimensions of the front of the terrace. We will remove the top part to form a small balcony (refer to step 5 of the preceding screenshot). 127 Haunted House – Modeling of the Scene 6. For the roof of the rear block, we will slightly change the style with a simple tilted platform. We will change the rear block to bevel it. We will duplicate the top face (Shift + D) and make a new object with it (press P and select Selection). We will need to make an extrusion on the z axis to add a thickness, then we will adjust the size and the position of the wireframe in the Shading Mode (refer to step 6 in the preceding screenshot). 7. We will now mark a boundary of two floors with a concrete ledge. For this, we will need to add a new cube (press Shift + A and select Mesh Cube) scaled on the y and x axes (S + Shift + Z) to be around the main block. We will give it a height of 15 cm and make it exceed the block by about 20 cm (refer to step 7 in the preceding screenshot). We will do an inset (I) on the top and bottom faces, then we will delete the nonvisible faces. 8. Let's form the stairs. We will add another cube, then we will resize it to be 84 cm on the z axis and 1.5 m on the y axis. We will need to divide it into six equal parts horizontally and vertically. In order to gain time, we will add a Mirror modifier (refer to step 8 in the preceding screenshot). We will remove the unwanted faces, and then extrude the contour of the top towards the symmetry axis to create the missing faces (refer to step 9 in the preceding screenshot). We will place our stairs in the middle of the front part of the terrace. 128 Chapter 5 These few simple 3D models done in a short time gives us an idea of what our haunted house will look like with further modeling. Refining the blocking Now that we have the foundations of our model, we will go into the details by adding more defined objects. Adding instantiated objects If we analyze the majority of the houses, we can see that they are mainly composed of repetitive shapes such as windows and doors. So we will use the techniques that allow us to duplicate objects by instance. This means that if we change the geometry of the source object, all the duplicates will change too. As you may have understood, this is really useful in order to save time: for instance, with UVs. Now, perform the following set of steps: 1. Let's start with the low wall around the steps. We will add a cube that we will orient with the slope of the stairs. 2. We will add an edge loop in order to break the slope. Then we will add a thinner piece that recovers the slope. To do this, we will extrude the top faces and scale them appropriately on the same level, and we can redo an extrusion. 3. In order to mirror the other side of the low wall, we will center the pivot point of the stair object at its center (Ctrl + Alt + Shift + C and select Origin to Geometry). Now we can safely add a mirror modifier with the stairs as the mirror object (refer to step 12 of the preceding screenshot). 129 Haunted House – Modeling of the Scene 4. Next, we will do the columns that will support the roof that covers the front of the terrace. We will need a 16-face cylinder that is 18 cm wide with a height of 2.8 m. In the last tool options in the left 3D view panel, we will choose the Nothing option under Cap Fill Type. We will then position it on the left-hand side of the stairs, and we will duplicate it as instances with the Duplicate Linked (Alt + D) function. 5. In the Object Mode, we will place our columns at the four corners of the terrace roof. In order to add some details to the columns, we will add some loop cuts (Ctrl + R) on the top of the roof and extrude the face loops along the normals (E + Alt + S) (refer to step 13 of the preceding screenshot). Duplicate Linked This tool allows you to duplicate your 3D model as instances. This means that when you do a modification in the Edit Mode on the source object, the transformations are applied to the other duplicated objects in real time. The UVs are also instantiated. However, when you manipulate the object in the Object Mode, the changes are not reflected in the other instances. In order to break the instantiation link, we can use the Make Single User menu (Call Menu (press U) Object and Data). 6. We will now work on the bars that delimit the terrace. We will take a new cylinder, this time thinner with a radius of 5 cm and a height of 1.2 m. We will again remove the caps that are pointless here. 7. In order to duplicate our 3D object, we are going to use the Array modifier. We will use a relative offset of 3.100 on the x axis. We will take advantage of the replication of the array in order to improve the shape of the bars a little bit with some loop cuts and extrusions (refer to step 14 of the previous screenshot). 130 Chapter 5 8. Since the bars are along a straight line, we will duplicate them with a normal duplicate (Shift + D) to place them on each side of the terrace. We will also need to adjust the number of bars to match the surface of the terrace. The Array modifier This modifier allows you to duplicate your 3D models with a customizable offset. You only need to choose the number of repeated objects that you need with the Count parameter and the distance of the offset (constant or relative) on any axis. You can also automatically merge your duplicated polygons with the Merge option. If you want to modify the geometry of a mesh, the array takes the object volume into account, so be careful. A transformation in the Edit Mode can change the offset. 9. We will complete this with ramps. The ramp is a simple cube scaled on the x axis to make it longer. We will duplicate the ramp as an instance (Alt + D) wherever needed, but remember that you need to duplicate with Shift + D if you want to do some changes in the geometry (refer to steps 15 and 16 in the previous screenshot). The Duplicate Linked tool is very useful, but it is not very flexible when we only want to do a transform on certain objects. 1. Let's repeat the same technique to make a balcony railing on the top of the roof that covers the front of the terrace. We are going to change the shape of bars a little (refer to step 17 of the preceding screenshot). 131 Haunted House – Modeling of the Scene 2. We will also use an Array modie fi r to make the wall brackets that will support the different parts of the roof. We will use one Array modie fi r to make a pair and another to duplicate it with a good offset (refer to steps 18 and 19). 3. The same thing is done for the pikes on the roof that give a threatening look (refer to step 20 in the preceding screenshot). 4. The walls are a bit flat at the moment, so we are going to model a bay window with a particular shape (refer to step 21 in the preceding screenshot). We will start with a new cube (press Shift + A and select Mesh Cube), and we will resize it on the x axis to form the base. 5. We duplicate it to make the top part and add an inset for the frames of the windows. When this is done, we will duplicate it as a new instance (Alt + D), and we will place it on both sides of the main block of the house. 132 Chapter 5 It is also time to make a few conventional old-style windows. We will start with the windows on the front of the house (refer to step 22 in the previous screenshot). Let's start again from a cube: 1. We will delete the left side to use a Mirror modifier. From the front view, we will make the shape of the window with a few edge loops (Ctrl + R) and add an inset. From this model we will can make the frame and extract the shutters (refer to step 23 in the preceding screenshot). 2. We will create another window model for the roof. We will start its base with a flattened ( S + Z) and beveled (B) cube. The central part is an extruded edge with an inset, and there is a little roof with a curved slope (refer to step 24 in the preceding screenshot). 3. Let's add a fireplace (refer to step 25 in the preceding screenshot). This is also fairly simple to model, starting from a cube that is extruded and scaled. It uses the same basic modeling techniques that we have previously covered. Reworking the blocking objects Until now, we had quickly added a series of 3D objects to form a fairly rudimentary house and have a general idea of the entire model of the house. Now we will finish the modeling and review the topology of our models in order to make them more presentable. There is still a final important object to be made: the front door. It is composed of several 3D objects. There is the frame, door, lock, handle, and there is the top frame with a decorative pattern. The frame and the door are quite similar to the windows. The door will be created as follows: 1. We will use a mirror modifier each time. The lock is quite simple, just an extruded cube with a few insets (I) (refer to step 23 in the preceding screenshot). For the decorative pattern, we will use a circle in order to get a better round shape. 133 Haunted House – Modeling of the Scene The rays are extruded and moved by hand. Don't forget to add a few edge loops when you add the Subsurface modifier (refer to steps 24 and 25 in the preceding screenshot). 2. We will place the address number of the house. For this, we will use the Text tool (Shift + A and select Text). We will use the basic Bfont font of Blender, but you can download and use any font instead. We will use the Extrude: 2.3 cm and Depth: 1.2 cm parameters to make a small bevel. We will make two small nails to hold them. 3. We will now review every asset and remove the nonvisible polygons that are useless in our case. Instantiating many of our objects has greatly facilitated the work. 134 Chapter 5 4. We will also often add a Subdivision Surface modifier when it's needed. But sometimes, this is not the case, as a simple bevel will do the job as well. As always, you need to maintain your geometry with loop cuts or bevels. In both cases, we want to activate the Smooth Shading (in the left panel of the 3D viewport). 5. We will also detach some parts of the geometry from other objects. To do this, we will go in the Edit Mode and we will select the faces that we want to detach by pressing P and selecting Selection. This will allow us to rework certain objects and add the Subdivision Surface modifier with ease. For instance, for the roof, we will detach the center part and add tight edges near the four corners with the Bevel tool. We can also increase the windows' resolution by adding and placing some edge loops to form a nice round shape in the corners. All the improvements that we've done here are, in our case, pretty easy because we don't have to get a realistic result. We are taking a more "cartoony" path, and in the next chapter, we will paint textures by hand in order to add more details. Breaking and ageing the elements It's now time to refine some elements in order to give them an old/destroyed look. This will mainly come from the texturing work that we will do later, but we can still work on the geometry a little bit: 1. We will begin by working on the stairs. We will delete the side faces that are invisible. (Refer to step 1 in the following screenshot.) 2. Let's add loop cuts below the angle of each stair. This will allow us to extrude a face in the front direction of the top of each stair. (Refer to step 2 of the following screenshot.) 3. We will then add two edge loops at the center to add more resolution. 4. Now with Proportional Editing turned on (O), we can select some vertices on the stairs and move them to break the shape a little bit. (Refer to step 3 of the following screenshot.) 5. We will now enter the stair ramps object and delete the one on the left. We will have to delete the invisible faces, those that are in the ground and in the house. 6. After this, we can move the origin back to its center (Ctrl + Alt + Shift + C) and duplicate the object (in the Object Mode) with Shift + D in order to move it back to the left-hand side. 135 Haunted House – Modeling of the Scene 7. We can then add definition to the object on the right-hand side with the Loop Cut tool. 8. At the top of the ramp, we will use the Knife tool and cut around a loop cut that we had made before. We will then push this hole inwards. (Refer to step 4 in the following screenshot.) 9. We can then repeat this process elsewhere on the other object. (Refer to step 5 in the following screenshot.) 10. The stairs are now finished. (Refer to step 6 in the following screenshot.) 11. We can also add a cut in the back wall of the house and move the vertices a little bit to add some sag. We now encourage you to go over each object and slightly move the geometry, with the Proportional Editing tool turned on (O), in a random manner in order to break each object's silhouette. You can also rotate the objects, such as the curtains. This is a house that is not new, plus it's probably abandoned 136 Chapter 5 Simulate a stack of wooden planks with physics We are now going to add little bit more details by adding a stack simulation of wooden planks in the front of the house. But instead of placing each plank by hand, we will take advantage of the physics engine of Blender that will do the job for us. In order to keep our stack simple and manageable, we will use the instancing principle that we've seen before. Let's start with the modeling of the plank: 1. The plank will be very easy to model by starting with a cube primitive. 2. We will then rescale this cube to make it thinner and larger. Note that if you do this in the Object Mode, you will have to apply the scale with Ctrl + A. 3. In order that the plank catches the light on its edges better, we will add a small bevel to it. There are two ways of adding bevels in Blender. The first one is the one that we've already used before with Ctrl + B. The other method is by adding a Bevel modifier. That's what we've done here. Note that if you want, you can apply the modifier too. 4. We will now duplicate the planks by instancing them (Alt + D). You need to place them one on top of the other. In order to add a little bit of randomness, we will rotate them slightly in an unordered way. About the Bevel modifier The Bevel modifier is nice because it is applied on the whole object, so we don't have to manage a lot of geometry while we are in the Edit Mode. We can adjust the Width slider to tighten or enlarge the effect of the bevel. The Segments option allows us to choose the number of cuts the bevel will be made of. The Profile of the bevel corresponds to the direction of the bevel; if it's negative, it will go inwards. Creation of the simulation of a stack of planks We will now create our simulation. In any rigid body simulation, the objects have some properties that define them. For instance, you can set their mass, velocity, or simply let gravity act on them as the sole force. In any decent physics engine, you can have static and dynamic objects. A static object is an object that, as its name implies, can't move at all but will be considered in the simulation when collisions occur. 137 Haunted House – Modeling of the Scene A dynamic object is an object that can receive forces. In Blender, static objects are defined as Passive and dynamic objects as Active. 1. We will select all our planks, and in the Physics tab, in the left 3D view panel (T), we will press the Add Active button. They will have a green outline. 2. Now we will set the ground object as passive by pressing the Add Passive button so that the planks don't pass through the house. The Physics tab 3. In order to simulate our stack, we will launch the animation. To do this, we will use the Alt + A shortcut or press the Play button of the Timeline editor. Note that if the simulation doesn't seem to launch, you can replace the Timeline bar on the first key frame. The final stack of wooden planks 138 Chapter 5 4. As you may have seen, there is an orange line on the Timeline that tells us that a simulation has been cached, but as soon as you go backwards in time, the simulation will be removed. So after the simulation has been completed, we will have to apply the placement of each of the planks. In order to do this, we will select them and click on Apply Transformation in the Physics tab. We can now safely replace the Timeline bar at the first frame, and our stack will rest still. Modeling the environment (8 pages) Now that we've finished the house modeling, we will improve our scene with an environment composed of a cliff, a barrier, a cart, and some rocks. Modeling the cliff Let's now model the cliff: 1. We will start by modeling its ground part. In order to do this, we add a plane and scale it. 2. We will then move the ground, so the house is placed above it. 3. We will use the scale tool in order to make the ground wider. 4. In the side view, we will enter the Edit Mode and activate the wireframe (Z). We will select the two vertices in the front of the plane, and by pressing Ctrl and the LMB, we will extrude the cliff profile to the left. 5. We will then reshape the geometry from a top view by moving the vertices with the Grab (G) tool. The cliff should be narrower where the house is. 6. The whole geometry will then be extruded down to form the height of the cliff. Note that you may have the normals of the face pointing inwards causing lighting mistakes. In order to recalculate them, use the Ctrl + N shortcut. Starting the cliff modeling 139 Haunted House – Modeling of the Scene 7. At this point, we can add some new horizontal loop cuts (Ctrl + R) in order to add definition to our model. Now our goal is to give the impression of a rock with the few polygons that we have. To get the shape, we will go in the top view, and with the wireframe turned on, we will select the edges of the contour of the cliff and move them to form ridges and a valley. This will give an angular look. Remember that all the details will come with the texturing process in the next chapter, so we only have to give the overall shape here. 1. We can improve the model with some randomness. To do this, we go in the Tool tab of the left 3D view panel, and under the Deform section of the Mesh Tools subpanel, we click on Randomize. The effect of the tool can be tweaked with the Amount slider in the last tool option panel. This tool will simply push all the individual selected components in a random direction. The final cliff 2. Lastly, we can arrange the global shape of our object with Proportional Editing. For instance, we can scale the tip of the cliff with it. Modeling a tree with curves We are now going to learn a new way of modeling certain objects with curves. Curves are entities that can be useful to model ornaments, shoelaces, ropes, tree branches, and so on. In our case, we will model an entire tree with them. 140 Chapter 5 A word about curves A curve is defined by control points that are connected together. Each point has a handle type. This can be changed by first selecting the control point that you want and by pressing the V key. By choosing the Vector type, the point will be angular. We are choosing Automatic or Aligned, so you will have Bezier handles that define the smoothness of the point. Handles always work in pairs. You can break their link by selecting the handle that you want to disconnect and by pressing V and select Free. In the beginning, you will find that curves are hard to manipulate, but with a little bit of practice, it will become as easy as pie. But, of course, there is lot more to discover about them 1. We will add a new curve of the Bezier type (press Shift + A and select Curve Bezier). Then we will enter in the Edit Mode. 2. We will then turn off the handles and the normals of the curve. To do this, we will uncheck the Handles and Normals check boxes under the Curve Display subpanel in the right 3D view panel (N). The Curve display options in the N panel. 3. When you start working on a shape that uses curves, it's easier to set all the control points as Vector (press V and select Vector). 141 Haunted House – Modeling of the Scene 4. Now we will leave the Edit Mode and add a new curve object of the bezier circle type (press Shift + A and select Curve Circle). This circle will define the volume of our bezier curves. 5. We will select the bezier curve, and in the Properties editor, we will click on the object data icon. Under the Shape subpanel, we will then select the circle as the Bevel Object. As you can see, the curve is now getting a volume defined by the circle. If you change the circle, its scale, for instance, will change the curve volume. 6. We will then close the holes on each side of the curve by checking the Fill caps option under the Bevel Object one. 7. We can now modify our curve to form the trunk of the tree. To do this, we can simply vertically rotate the two points that we already have and extrude the tip several times with E or press Ctrl and LMB. You can also subdivide the curve by selecting at least two consecutive points and pressing W and select Subdivide. 8. Now we can change the radius of each point by changing its value in the Transform subpanel in the left 3D view panel. This is how we will taper the trunk. 9. We can now add new branches to our tree by simply adding a new point by pressing Ctrl and LMB without anything else selected. This point could then be extruded. We can also change the radius of the branch. If you want to quickly select a branch, you can either select one of its points and press Ctrl + L, or select one of its points and press Ctrl and the + numpad key several times. 10. We will now add more branches by duplicating the first one that we've created. The process simply involves the duplication and placement of a lot of branches that differ in size and radius. 11. Next, we can convert our curves to a mesh object. In order to do this, we will have to first decrease the subdivision of our branches and our circle profile object by going to their Object data tab in the Properties editor and by changing the Preview U (for the viewport) and Render U (for the final render) sliders. We can now select our curve object and press Alt + C and select Mesh from Curve/Meta/Surf/Text to convert our curve object into polygonal geometry. 142