Tested versions

4.3 rc2

System information

Windows 11

Issue description

On forward renderer the simple MeshInstance with a SphereMesh looks like this (which is correct):

On compatibility renderer it has blurpy artifacts:

IDK if this is already reported, feel free to close if then.

Steps to reproduce

Create a MeshInstance3D and assign a SphereMesh to it, and run that scene on Compatibility Renderer.

Minimal reproduction project (MRP)

TestSphere.zip