mr 3.9 should be able to read tiled exr and use it the same way as the native map files, is that correct?
If yes, then my tests show that there is no difference at all if I use tiled exr or non tiled. I checked the exr files with the exrheader tool from exr tools. It shows that one version of my exr has no tiling information the other has tiles. Both renderings needs the same amount of memory an time.
The reason why I want to try tiled exr instead of map files is that the finalgather pass with map files takes up to 8 times longer than without map files. So maybe anyone can answer my questions:
- are tiled exr supported for caching?
- any idea why fg pass with map files takes so long? Is it because so much lookups are necessary for hemispherical fg sampling?