tim doerries 9490a6d777 Fix for SparseVolumeTexture upload shader reading past the 2^27 maximum element limit of certain (typed) buffers and reading zero. Fixed by splitting uploads into smaller chunks. ...

#rb Sebastien.Hillaire
#rnx

[CL 26571688 by tim doerries in 5.3 branch]

2023-07-25 09:40:41 -04:00

..

SparseVolumeTextureCommon.ush

Fixed SparseVolumeTextureSamplePageTable() and SparseVolumeTextureLoadPageTable() sometimes loading from the page table at incorrect coordinates when the page table is using a page table offset. Fixed incorrect page table offset in SVT sequences causing parts of the volume to appear cut off at higher mip levels. Fixed empty vdb frames during import causing massive VolumeResolution values in the resulting SVT. Fixed StreamingManager triggering an assert when all voxels of a higher mip level have been stripped away due to occupancy bitmask based compression. It seems that higher mip levels can sometimes be empty despite lower mip levels having valid data. I suspect that this is due to precision issues when averaging 8 small float values and then quantizing them during the mip mapping.

2023-06-23 10:14:28 -04:00

UpdateSparseVolumeTexture.usf

Fix for SparseVolumeTexture upload shader reading past the 2^27 maximum element limit of certain (typed) buffers and reading zero. Fixed by splitting uploads into smaller chunks.

2023-07-25 09:40:41 -04:00

VisualizeSparseVolumeTexture.usf

New streaming system for SparseVolumeTextures. It is based on the Nanite FStreamingManager design and supports streaming both from disk and from DDC. This first version uses a single logical tile data texture for all frames of a single UStreamableSparseVolumeTexture and starts streaming out tiles of older mip levels once it runs out of space. The highest mip level (lowest resolution) is always resident in the tile data texture, so there is always something available for rendering. Each frame's page table texture is currently always fully resident. There is now also a buffer storing the lowest resident mip level index for each frame.

2023-05-31 08:14:22 -04:00