Lighting glitch in hobby version of Twilight render for Sketchup

Recently I had problem that my roof material when rendered looks like some sort off reflecting metal.
Any help or suggestions from you guys what to do next would be higly appreciated.
:smiley:


This is how my house looks in Sketchup.

Check the face orientation in SketchUp. Is the face on the roof reversed?

Thank you Dave, problem has been solved. I checked the roof face orientation and it was inversed wrong sides. :smile: