A simple tool to easily combine materials on a single texture atlas and material, useful to improve batching and reduce draw calls on mobile games.
- All textures are combined on a texture atlas using Unity's built-in PackTextures method
- A new material that uses the texture atlas is created.
- New UV's are calculated and applied to each selected mesh. Currently it is not saving the new meshes on assets, but it should be easy to do. :)
- Add the Editor folder to your project.
- Select the GameObjects that use the materials that you want to combine.
- Click on Window/TextureAtlasCreator to open the tool window, you can see all textures that can be combined on an atlas and also change the max size of the generated atlas.
- Click on "Create Texture Atlas" and wait a few seconds. You will be asked for paths to save the atlas texture and material. After some time you will see a window showing the generated atlas and all the selected meshes will be updated with new UVs and a new material that uses it.
- Only works with materials using Mobile/Diffuse shader (actually, with a minor change it should work with any material that uses a single texture shader)
- Can't handle meshes with UV maps outside of 0-1 range
- Defining the atlas size could be somehow automatic