Artifacts in MovieRenderQueue

Hey all!

I am using UE4 to render out some short animations and have noticed that there is a small square pattern overlaying a lot of my scene. Does anyone know what could cause this? Rendered to .exr so it shouldn’t be compresion.

Attached photo example of the issue:

Rendered a new image that shows the issue a little clearer, there is a pattern of squares all over the character. Any advice or direction would be greatly appreciated. Would switching to path tracer help?

The material has no texture, just a single float of 0.5 attached to the base color.

Has anyone else experienced this issue?