Background visibility

[amorp]

Hi guys,
really need you help, i have very strange problem,when i put background image for interior scene to see it through windows,i just get white surface
i can't understand where the problem is,i spent hours try to understand what can cause that problem - check the material transparency for windows,check a lot of background jpeg images - i use the same image for background,the same transparent glass material in two different files - in one everything is okay, and i can see background image through window,in another file, i can't.it's really strange,any suggestions are very welcome,appreciate your help!!!

[hvanessen]

Is the window just a plain surface ? And when it is not then you must check if you have painted both sides with the glass material. When the windows has thickness you must paint both sides.

IMHO it look likes you have not painted both sides.

[amorp]

Hi thank you for your comment,you right the problem is in the glass transparent material,
but i have painted both sides of window glass,it has thickness 1 cm,still the problem stays
I have find the solution to this very strange thing since the same materials in two different files,in one file is fine and in another is wrong.
in Glass material,in options i check "Only visible in secondary" - maybe,it's damages in certain way on seeing reflections on the glass,but at least i can see background lanscape through windows

[valerostudio]

Put your glass on a layer and turn it off just to test to ensure it is the glass material. You have make sure that if you glass has thickness, make sure all the faces, in and out have the glass mat applied and that your front faces are all facing out. My understanding is that refraction needs this setup properly.

[amorp]

Thanks Valerostudio,
i will try your suggestion,it's something deal with refraction,in some strange way refraction has been blocked

[andybot]

Is your glass a closed volume? it matters to vray to calculate refraction for the volume to be enclosed. If your glass is just two planes, it my not work properly. Try grouping one plane and push-pull to make a volume.

Andy

[amorp]

Hi Andy)
it's chaos from Chaos Vray for Su forum,here i have a different nick...i have solved this problem,it's strange,when i was hiding glass material,i could see my landscape image,but the problem was not in glass component or glass material, the problem was that landscape image was layered on back face of arc surface,it wasn't facing out,when i paint my image on front face - everything is get okay)))))just 6-7 hours of wondering,trying, asking were spent,but now i know where the source of that was