When Path Tracing is enabled things get default checker gray material

So as mentioned above.

Everything works fine in “Lit” Mode. When i turn Path Tracing on many objects in the scene turn Checker gray.

How can i fix this ? (I also somehow added a normal map on the Default Checker material. Where can i find that material?)


After further investigation with that problem i noticed that only the assets that are imported as a USD or USDZ file formats are having the problem. Still can’t figure out why though. The search continues.