7. 3D Modeling in Unity

Chapter seven of our e-book focuses on 3D Modeling in Unity, a crucial aspect of creating games. 3D modeling is the art of creating a three-dimensional object in digital space. This is done using 3D modeling software such as Blender and then imported into Unity for use in games. However, it is important to note that Unity is not 3D modeling software, but a game engine. It uses 3D models created in other software.

What is 3D modeling?

3D modeling is the creation of a three-dimensional object within computer software. The finished product is called a "3D model" and can be viewed as a 2D image through a technique called 3D rendering, or used in a 3D computing environment. These 3D models are used in a variety of media and industries, including film, architecture, mathematics, engineering and, of course, computer games.

Importing 3D models into Unity

After creating your 3D model in 3D modeling software, you can import it into Unity. To do this, you need to export your model as a .fbx or .obj file, which are widely accepted formats for 3D models. You can then drag and drop the template file into the Unity assets panel.

After importing your model, you can drag it into the scene and start working with it. You can move, rotate, and resize the model using Unity tools. You can also assign materials to the model to define its color, texture, reflection, and other visual properties.

Creating materials and textures in Unity

Materials in Unity are used to define the appearance of an object. They are created in the assets panel and can be assigned to any object in the scene. A material uses a texture, which is an image that is mapped to the surface of the object.

To create a material, right-click in the assets panel and select "Create > Material". Then you can set the material properties such as color, texture, brightness, opacity, etc. To assign material to an object, simply drag and drop the material onto the object in the scene or inspector.

Textures are images that are mapped to the surface of an object to give the object a detailed appearance. For example, a brick texture can be applied to an object to make it appear as if it is made of bricks. Textures are created outside of Unity, usually in an image editing program, and then imported into Unity.

Lighting and shadows

Lighting is an important part of creating a realistic scene in Unity. Unity offers a variety of lighting options, including directional, spot, and spot lights. You can also adjust light properties such as color, intensity, and range.

Shadows add depth and realism to the scene. They are automatically created by Unity based on the position and intensity of the lights. You can adjust shadow properties such as softness and opacity.

Conclusion

3D modeling is an essential skill for any game developer. Although Unity is not 3D modeling software, it is capable of working with 3D models created in other software. By understanding how to import models, create materials and textures, and work with lighting and shadows, you can create incredible, realistic scenes in your games.

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8Texturing and materials

3 minutes