Maybe db4tech has any ideas? He programmed the advanced render plug-in.
Aw Hans, as much as I wish that was true, Emmanuel is the programmer! 
Thank you though!
I wonder why the doors (on the left) are rendering with an unusual shiny patch in the middle?
Good work trying to find the walls solution, very thorough!
db4tech
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Good catch whippet on finding the solution, not sure I would have noticed the slider since it was only slightly moved!
I never realised the walls rendered as transparent, if the transparency slider was changed, I thought that feature was purely for OpenGL 3D, to assist in positioning difficult items close to walls.
db4tech
