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CREATE A BASIC SCENE

INTRODUCTION

Here you'll learn how to create a basic scene with a simple animated model and textures, to export it later. You need basic knowledge of 3ds max for more complex scenes, but this tutorial will use very basic commands, so you should be able to follow it without previous experience with the software.

1. CREATING A PLANE

We'll create a plane, the very basic figure in 3D, and also the easiest one to add textures. Once you start max you should see something similar to this screen: 3ds max interface You may see something slightly different, depending on the startup workspace that you use. In this tutorials, the shown interface scheme will be “ModularToolbarsUI” (You can find it in the Customize menu). Anyway, you shouldn't have problems finding commands.

You can create a plane from the “Create” top menu, or from the right panel: Two ways to create geometry

Now, click and drag the cursor over the grid to give the size to your new plane. If you press Ctrl while dragging, it will remain always as a square shape. As we want it to stay on the “ground”, let's create it from the top view, usually the one at the top right corner. Creating the plane

Aligning the plane to the scene's 0,0,0 coordinatesWe created a plane, but is almost sure that we didn't create it exactly in the center of the scene, and this is quite important, as the center of the scene (0,0,0) will be the pivot point of the scene when we transform it from the engine.

To align it to the center, look for the “Select and Move” tool in the main menu buttons. If you click on it, you will activate the select and move mode, allowing you to move objects dragging the handles. In this case, we want to write down the exact values for the plane's position, so right click on the “Select and Move” button, and a popup will show up. Insert the “0” value on X, Y and Z of the “Absolute:World” field. This will align the plane exactly to the center of the scene.

It's also very important to name correctly our objects in the scene, so then, in the engine, we know what is each object just looking at its name. This is specially useful in really big and complex scenes. It's possible to name objects in a lot of different ways, but these are probably the easiest and more accessible ones: from the right panel menus. Naming objects from the right panels Both from the “Creation Panel” and from the “Modify Panel”, it's possible to change an object's name and color in the viewport. From the “Modify Panel” is even possible to modify different parameters of the selected object, in this case, a plane primitive, so it allows us to give it a size and a number of divisions.

You can also right click over an object, go to “Object Properties”, and between a number of other options, you'll find how to change the name and color of the object.

2. ADDING A MATERIAL TO THE PLANE

The ARLab logo, the texture we'll use in this exampleNow we have our plane in the scene, we want to add a material with a texture to it. As texture, you can use whatever image you have in your computer. Most used and widely supported formats are .jpeg, .png or .tga. In this example, we'll use this ARLab logo image.

It's an image with a size of 512×512 pixels, an usual size for mobile platforms textures.

Even you can use images with random sizes, it is recommended to use power of two values in squared images (128, 256, 512, 1024, 2048…).

To create and apply a material, we need to open the “Material Editor”. In latest versions of 3ds max there are two different editors. One of them is for more advanced users, and it's a node-like editor. Here we'll use the other one, which is simpler for basic materials, as the one we want to create for this scene. Looking for the Material Editor button Look for this button at the main menu. If you keep it pressed, it will display the two options for the “Material Editor”, select the one that is highlighted in yellow on the image above. It should launch this window: Material Editor

In this Editor we can modify all the aspects and parameters of a Material. A Material is what gives a 3D object an appearance, shininess, color, reflections… everything. In this basic case, we just want to apply a texture to it, nothing fancy, so first, name the material something like “Plane_Material”. Same as with models, is very important to have intuitive names for everything we create in the scene.

The “Diffuse” channel is the color of a material. So we need to click on its “Map Slot” indicated in the picture to be able to add an image to that channel.

Each channel controls an aspect of the material. An advanced user would need control for more channels, but we'll keep it simple this time.

After clicking in the Diffuse Map Slot, another window will show up, with several options to create maps. The one we want is the first one: Bitmap. Double click that option, and from the popup, select the file in your computer that you want to use as the diffuse texture.

Once this is done, the material editor will show the parameters of that particular slot, and not the general material options anymore. It's a little difficult to get, but we can think about parent/child relations between a material and its slots. We can easily navigate up to the parent, or click the slot again to see the child. Let's take a look at some buttons that will make our life easier in the Material Editor: Material Editor Options

1. Assigns the current material to the selected object/objects. Press this button to apply the material to the plane.

2. Shows the current slot/material on the object in the 3D Viewport. It is recommended that you do the point 3 before activating this one, so you'll see the “complete” material, not only the current slot.

3. Navigates to the parent of the current slot. In the current one it will lead you to the general material options.

So, if you followed correctly the previous points, you should end up with something like this on your screen: Textured plane model and parameters

3. ANIMATING THE PLANE

That's it, now we're going to give this plane a little and simple animation, just for you to understand how it works. We'll make it rotate around itself continuosly.

Select the button at the right of the “Select and Move” one, with the rotation symbol. You can also press E on your keyboard: W, E and R let you switch between translating, rotating and scaling modes.

At the bottom of the screen, there is the timeline. Look for the “Auto Key” button, and activate it, everything will become red, to let you know that if you move something, the software will store keyframes. Before moving the object, let's slide the timeline marker to the last frame: Timeline and AutoKey Now, we need to click and drag the rotate handles to make the plane rotate almost 360 degrees. It is possible to use snapping options to make specific rotations like this one, or we can right click the rotation button to do the same we did to align the plane to the world center, but here we'll make it manually in this case. Over the rotation gizmo you'll see a tooltip while rotating letting you know how much you're rotating it. Animating the Plane and creating a keyframe Automatically, when you release the rotation handles, two keyframes will be stored for the plane, at frames 0 and 100. This is the effect of “AutoKey”, it records automatically the transforms in objects. As we're done with the animation, you can disable it already, to prevent inserting more keyframes accidentally.

Now, if you press play, the plane will rotate again and again (as the animation will be looped). And we're done with this scene. Now we just need to export it to the 3D Engine.

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