How to get light to pass through glass?

[steelers05]

I am doing a rendering and I have glass windows that dont seem to be letting the sun pass through. Now the sun shows up in SU and i did the whole ticking and unticking the overide but I still cant get the light to penetrate through the glass...can anyone tell me how to resolve this? It is a similar situation when I have a background image..it seems to block the sun in vray and not SU, but when i get rid of it, the sun works perfectly fine...how can I use a background or glass etc.. and allow the sun to still penetrate thrgouh? Thank you all in advance

[dcauldwell_cg]

Re: How to get light to pass through glass?

Try this
http://asgvis.com/index.php?option=c...19451#msg19451
and
http://asgvis.com/index.php?option=c...11138#msg11138

David

[steelers05]

Re: How to get light to pass through glass?

Thanks dcauldwell. That seemed to fix the problem. But with the background thing...how can I accomplish that. For one rendering I just created a plane and imported an image onto it to create the background for my scene. I made it so that it did not receive or cast shadows. And then I added an emissive layer to brighten it up. I set my sun up and it showed up in SU but not vray. I did all the right things for sun settings because when I removed the background, the sun would render correctly. But i still wanted to have the background as well as the sun...is this possible? Or will something like this always block the sun in vray? I even tried rendering without the emissive layer but that didnt help. Any suggestions from anyone are greatly appreciated.

[dcauldwell_cg]

Re: How to get light to pass through glass?

Check out
http://asgvis.com/index.php?option=c...20539#msg20539
and
http://asgvis.com/index.php?option=c...20669#msg20669

I think your non-sun obscuring options are

2 Use a HDR Image e.g. Spectralogue, 1000Skies.com, etc. – This gives you the advantage of providing an image in your reflections, but often res is so low that they make poor (low res) backgrounds. You can use these to illuminate the scene if they have been prepared properly.

3 Use a jpg - as 2 but these cannot illuminate the scene. Again hi resolution bitmaps are available – up to 14000pix wide. With the physical camera ‘on’, the bitmap multiplier (environment-background-bitmap multiplier) needs to be set at approx 15000 for it to show up

Or you need to move the background billboard away so that the shadow does not cast in the scene, but personally I like shadows, its controlling them that is tricky!

Note that the intensity levels are for pre SR1 version, SR1 requires much lower settings.

David

[steelers05]

Re: How to get light to pass through glass?

Thank you. This helped a lot. Ill just keep plugging away.