VRay Light/Shadow Issue

IGfortyK

Hello,

SketchUp user and VRay amateur. I am simply trying to render this perspective. The issue is apparent, i think. The faces facing the sun are rendering with odd shading around my "cut opening" components (the windows and the panel joints). I have tried both the CPU and GPU engine, draft and low quality settings, and have not changed any other default sun settings. Also, I do not have any hidden geometry where it occurs.

How do I get rid of those triangular patches of shadow/light so it renders as a singular plane?

Thank you!

VRay render

SketchUp screenshot

IGfortyK

For those curious, I re-rendered it on a PC with a better CPU and GPU and it came out fine, no issues. But I am still curious as to why this problem occurs in the first place, perhaps I can improve my modeling/rendering methods to avoid it.