[Runtime Bug]: Taking a capture when a mesh is being drawn by the remixAPI will result in a crash

[xoxor4d]

Describe the bug

Taking a game capture when a mesh is being drawn by the remixApi will result in a crash in GameCapturer::captureMaterial.

It seems like the material of the api mesh is being interpreted as a LegacyMaterial and does not contain a valid
colorTexture pointer. Thus, materialData.getColorTexture().getImageView()->image() will access a nullptr and throw an assert:

https://github.com/NVIDIAGameWorks/dxvk-remix/blob/86269785f17a8151aea058bfbdb480d27bf2eaa9/src/dxvk/rtx_render/rtx_game_capturer.cpp#L493C31-L493C43

The meshes I've tried this with had no albedo texture assigned (simple emissive prims and rayportal's)

Note:

I've created a PR with a band-aid fix preventing api meshes from being captured:
NVIDIAGameWorks/dxvk-remix#82

How do you reproduce the bug?

1. Create a material, a mesh and then draw it via the remixApi (only tested on x86 through the bridge)
2. Take a game capture

What is the expected behavior?

Turning off replacements should also turn off meshes drawn via the api OR they should not be interpreted as legacy meshes

Version

latest

[NV-LL]

REMIX-3696 for tracking