Unexplainable Shadows with Workbench Render Engine

Support Modeling
#1

Hello,

I have a model of an industrial engine that when rendering with the workbench render engine has some bad shadows. I tried many things that I figured it may have been but it did not help. I tried:

recalculating outside Normals, merging double vertices, checking for creases and marked edges etc. If anybody has any ideal it would be a great help. It does not have this problem with EEVEE. I have uploaded the file here. Only part of the engine model is left by the way in the file. I had to delete most of it to make the file small enough to upload here.

As well I have uploaded a quick render so you can clearly see the odd shadows being produced.

Engine Bad Shadows With Workbench Engine Render
Engine Bad Shadows With Workbench Engine Render1920×1080 141 KB

Engine Bad Shadows with Workbench Render.blend (2.4 MB)

#2

Messed with it some more. Decimate geometry removed the guilty parts of the mesh. I believe it was caused by inside faces and normals intersecting through outside faces and such. The model was a mess imported as an obj from grab cad because I didn’t have time to model an engine for the project.

Reduced the geometry in half using decimate without a noticeable change in quality. Next time I will start my project much sooner in advance to model a comparable model taking my time over a long period of time and with cleaner geometry and a lot less geometry!