Blender Git Loki

USD Import: format fix.

USD Import: cachefile handle cleanup.

Removed CacheArchiveHandle opaque struct declaration from
DNA_cachefile_types.h. Moved CacheArchiveHandle and
CacheReader declarations to a shared common/IO_types.h header.
Removed unneeded casts. Removed unneeded USDStageHandle struct.

Format fixes.

USD Import: fixed build errors.

Merge branch 'usd-importer-T81257-merge' of https://gitlab-master.nvidia.com/omniverse/blender into omniverse

Fixed build errors.

Fixed build errors after merge with master.

Merge branch 'master' of https://gitlab-master.nvidia.com/omniverse/blender into usd-importer-T81257-merge

USD Import: Code cleanup.

Per review for D10700, simplified conditionals in the material
creation logic. Added comments.

USD Import: fixed comments.

Per review for D10700.

USD Import: Code cleanup.

Per review for D10700, simplified conditionals when
filtering prims by purpose.

USD Import: fixed conditional statement.

USD Import: revert custom data layer definitions.

Per review for D10700, removing custom data definitions originally
added for attribute import, as this change requires further
discussion and as additional work is required to complete
the implementation.

USD Export: texture export options.

Added Export Textures and Relative Texture Paths options.

USD IO: enable USD preview conversion by default.

Setting generate_preview_surface, import_usd_preview and
set_material_blend options to true by default, to enable
conversion to and from USD preview surface materials.

USD Export: setting color space.

Now setting color space input on UsdUVTexture shader.

USD Export: USD preview opacity bug.

Fixed bug setting UsdPreviewSurface opacity input value.

USD Export: material mapping fix.

Now mapping the Alpha socket to the UsPreviewSurface
opacity input.

Merge branch 'usd-importer-T81257-merge' of https://gitlab-master.nvidia.com/omniverse/blender into omniverse

USD Import: Convert to Z Up true by default.

Changed the Convert to Z Up option to be true by default.

USD Import: handle sourceColorSpace.

When converting UsdUVTexture shaders, now querying the
shader's sourceColorSpace input, in addition to the
color space metadata of the file input.