EEVEE: MTLResourceStorageModeMemoryless not available on all supported platforms #116216
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Reference: blender/blender#116216
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System Information
Operating system: macOS-14.2-x86_64-i386-64bit 64 Bits
Graphics card: Metal API Intel(R) UHD Graphics 630 1.2
Blender Version
Broken: version: 4.1.0 Alpha, branch: main, commit date: 2023-12-15 06:05, hash:
bc51f541c244
Worked: (newest version of Blender that worked as expected)
Short description of error
Metal backend uses features that are not available on all supported platforms.
Exact steps for others to reproduce the error
MTLResourceStorageModeMemoryless
seems like an optimization features and could be worked around, although with some performance loss. According to documentation memory less storage mode is only supported by Apple GPUs. Workaround would be to useMTLStorageModePrivate
EEVEE: Metal uses features that are not available on all platformsto EEVEE: MTLResourceStorageModeMemoryless not available on all supported platformsNot exactly sure where a change manifested, but the memoryless flag should only be enabled for EEVEE shadow fallback if
(GPU_platform_architecture() == GPU_ARCHITECTURE_TBDR);
.I think there may be a missing patch pending merge to remove this usage. It may have been part of the original shadow atomic fallback patch to allow full memoryless render-target support.
The actual offending usage of MEMORYLESS, in EEVEE Next shadows, does not need any attachments at all, just dimensions.
Will submit a fix.
I should add that it should also be changed in the backend to only support this flag on tile-based systems, this is something I can look into.