Alpha transparency is not working

[Ernest Atanasiu]

Hello there!

AC18, CineRender engine, standard objects and materials.

I have a strange situation here: a "Solar Shade Straight" object in front of a window . The louvers are made of perforated steel material (Metal - Perforated Small Dots). If I render from the inside, the louvers are not transparent at all although the light is getting in the room. If I remove the window object everything is rendering normally.
The attached image shows both situations, in the middle there is no window behind the lovers.

Any suggestions?

[/img]

[Karl Ottenstein]

I suspect this is the issue you have to adjust:
http://helpcenter.graphisoft.com/troubleshooting/3d-modeling/texture-overwrite-fails/#CineRender_and...