Meshes "Shimmer" at Certain Angles

I’m updating an old game of mine and replacing most of the environment with MeshParts for a few reasons, primarily so I can add some subtle vertex color shading and have a blocky noise effect run across the environment without seams popping up where parts meet. Unfortunately it has introduced this “shimmering” effect where the edges of the mesh, especially from far away, have these bright flickering pixels.

They disappear when Anti-Aliasing is disabled and I’d probably like to force it off anyways since Roblox’s implementation of AA looks gross most of the time, but Roblox being Roblox grants us 0 control over the render pipeline

Any way to avoid this issue? If so, please do tell!