Antti Polkoinen

Unfortunately, no.

Loading and using .sbsar assets in Houdini with GPU acceleration is a dream come true.
The old COPs version was so slow beyond 2k resolution; I guess it only used the CPU.

C4D has perfect Substance support. Just drag and drop, and it works out of the box with Redshift.

It would be great if Karma and OpenGL/Vulkan could remember the 'display materials on objects' checkbox independently.
That way, when switching to OpenGL/vulkan, the textures would stay unloaded. Independent material view control per renderer would be ideal.
Like Heileif said, this would also save a significant amount of VRAM, which is literally wasted.
99.999% of the time, I don't need to see material previews, grey, ugly geo FTW
Hiding textures and setting the draw mode to 'Bounding Box' saves 90% of Vram in heavy scenes.

I don’t know why, but the Redshift OCIO config doesn’t work with Karma.
The MaterialX image node seems to ignore the color rules.
Here’s how to hot-reload custom OCIO configs:

hou.putenv("OCIO", hou.expandString("$HOUDINI_USER_PREF_DIR") + "/ocio/rs_config.ocio")
hou.Color.reloadOCIO()