Improper Rendering of Diffuse Lighting

[vtrapanese29]

Material Maker version:
1.5.1

OS/device including version:

Issue description:
This may be related to the recent driver update, but it has been difficult to trace. Diffuse lighting on the 3d preview has been rendered improperly. Post processing settings do not improve this either.

No post processing

With post processing (AGX, Glow, etc.)

Steps to reproduce:
Again, difficult to trace, but may be driver related. Upon the program opening, 3d preview is rendered incorrectly regardless of the loaded textures.
Ex, and note this is not an emissive texture at all:

[williamchange]

I dont have a nvidia card but here's what it looks like for me

[vtrapanese29]

I dont have a nvidia card but here's what it looks like for me

This is what my Preview3D looked like as well until 3/10 😅. I'm trying to find what exactly went wrong because I'm not actually convinced it's the drivers. I'll attempt a rollback just in case.

[vtrapanese29]

Confirmed as not a driver issue. Older drivers and the more stable Nvidia Studio drivers show the same problem. The driver update was just a coincidence.

[vtrapanese29]

Just to add additional detail:

• All baked textures are still correct
• Rendering when exported to Godot is correct
• 2d Preview is as expected

The problem only shows up in the 3d preview and seems to affect only the lighting on any normals that are not facing directly in +y or ±x (?). Additionally, setting the surface to be completely metallic and reflective will reflect black when rotating by a certain amount.

[VictorPortize]

Hi, apparently the problem doesn't occur in version 1.3. I'm new to this software, so I thought it was an incorrect setting on my computer.