Add testrender volumes#2053

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ThyOwen wants to merge 13 commits intoAcademySoftwareFoundation:mainfrom

ThyOwen:add-testrender-volumes

Commits on Oct 20, 2025

super simple: medium tracking, HG volumetric scattering and test render under render-mx-medium-vdf
ThyOwen
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Commits on Oct 28, 2025

MediumStack stores Medium sub classes similar to CompositeBSDF. PhaseFunction has been deleted.
ThyOwen
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Commits on Oct 31, 2025

add volume indirect ray generation
ThyOwen
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Commits on Nov 8, 2025

Cleanup. MediumStack book keeping takes place in shader evaluation. Medium sub classes need a static create method. Added anisotropic test.
ThyOwen
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Commits on Nov 11, 2025

Added priority handling for overlapping media
ThyOwen
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Commits on Nov 18, 2025

Commits on Nov 27, 2025

Update medium memory allocation to support Optix. Added OptiX alt images (none for medium-vdf-glass).
ThyOwen
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Commits on Nov 30, 2025

Merge branch 'AcademySoftwareFoundation:main' into add-testrender-volumes
ThyOwen
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