Tiled texture storage and sampling in Cycles kernel #55264
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Reference: blender/blender#55264
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This task concerns the implementation of a compression technique for large sparse datasets (e.g. Volumes). This is done by subdividing the dataset into smaller grids, and discarding the ones that do not hold any meaningful data.
This task is part 1 of my GSoC 2018 project .
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Added subscriber: @gschua
With threshold set to 0.0f (unfortunately hard-coded right now), memory usage of the color texture in this example is reduced by ~33%. If set to 0.2f, memory usage is reduced by ~66%, with no significant visual loss.
I have attached photos of the green smoke with no tiling, with 0 threshold, and with 0.2 threshold. You can also download the .blend file to try.
If you notice the rendering speeds, the non-tiling one rendered much faster. This is most likely because the sparse grid is no longer treated as a mesh volume , and hopefully does not have anything to do with this task. I will see if it is possible to make these two functions compatible.
example.blend
No tiling:
0.0 threshold:
0.2 threshold:
This issue was referenced by 6998ecec2a9ca5541eb93803f3233c5e9ab23eb5
Added subscriber: @brecht
Changed status from 'Confirmed' to: 'Archived'
Archiving old tasks.