To create a 3D texture, import a 2D texture with the following properties:
The size of a 3D texture on disk and in memory increases quickly as its resolution increases. For example, a 3D texture with RGBAFloat
format, no mipmaps, and a size of 32 × 32 × 32 pixels has a size of 512 KB (32 × 32 × 32 × 16 bytes) in memory. If you increase the resolution to 256 × 256 × 256 pixels, the size in memory becomes 256 MB (256 × 256 × 256 × 16 bytes).
Follow these steps to import:
Unity adds a 3D texture slice for each cell in the texture.
An imported flipbook texture with 8 columns and 8 rows.
The texture after you set Texture Shape to 2D, Columns to 8, and Rows to 8.
Refer to Importing textures for more information.