Vulkan: Mipmap LOD bias settings behave incorrectly when there are multiple viewports rendering 3D

[Calinou]

• Related to Vulkan Clustered: ReflectionProbe roughness is affected by global Texture Mipmap Bias #65690
  and Vulkan: Automatic mipmap LOD bias based on resolution scale is discarded when Texture Mipmap Bias is set #84084.

Godot version

4.1.2, 4.2.beta3

System information

Fedora 38, GeForce RTX 4090 (NVIDIA 535.113.01)

Issue description

The mipmap LOD bias that is last updated (either automatically via Scaling 3D Scale set below 1.0, or manually with the Texture Mipmap Bias property) affects all viewports.

This can be noticed when adjusting properties in the inspector too.

simplescreenrecorder-2023-10-28_00.36.07.mp4

Steps to reproduce

Create a scene with 2 viewports rendering the same scene, then adjust Scaling 3D Scale and/or Texture Mipmap Bias on either of them (but not with the same values on both).

Minimal reproduction project

test_mipmap_lod_bias_multi_viewport.zip