Interior bounces from exterior view

[Geoffc]

As seen in the attached WIP test render, I'm trying to use 'real' glass and allow the exterior direct light to pass into the interior rooms and give them a soft GI lighting, as would happen in reality. But, the spaces are essentially completely dark, as if there are no secondary bounces once the light has passed thru the glass.

 

Im using IR/QMC, medium preset, 10 secondary QMC bounces.

 

 

Do I need to somehow exclude the glass material from the direct light and GI environment?

[Geoffc]

After a bunch of reading and experimenting, I think I may have figured out some. I enabled caustics, excluded the glass from the direct light shadows, kept fresnel on the glass, and gave the glass thickness, as opposed to using planes.

 

I also slightly upped the GI production of the interior floors, to help the bouncing.

 

Here's where I'm at now:

[ienrdna]

you should check "affec shadow" option in material, will give you sort of "fake" caustics