...
The optimization process consist of creating a mipmap version of a source image that can be used efficiently as a texture during rendering. This process is important as non-optimized textures (without mipmap) can slowdown rendering significantly.
Automatic Optimization
If During rendering, wherever 3Delight encounters a texture that is not already optimized, 3Delight it will try to optimize textures automaticallyit automatically. Optimized textures are stored at the same location of the source texture and will have the same base name as the original texture in addition to colour space information and the source texture but with the added .tdl extension. This process will skip any files texture that have the .tdl substring in the file name (e.g. test texturename.tdl.tif and test texturename.tif.tdl will be considered as optimized).
| Warning |
|---|
For the automatic optimization to work, the directory or directories where the source textures are located must have write permission not only to oneself, but also to other users as well (so the optimization process to works for them if needed while rendering). The source textures themselves do not need to have write permissions as 3Delight only access them for reading and never modifies them. |
...