No light through glass.

[Andrew Roane]

I set up a test scene to try and make some glass that I need for some windows. I want the sun to pass through the glass, but I keep getting shadows. I am using a direct light with Vray shadows, and the GI Environment is on. I am using light cache and irradience map to render. I haven't posted any settings because I have tried adjusting every parameter that I can see in the material editor. Please let me know if you have any ideas that could help, thanks.

[jafs00]

in your glass material setting, check the affect shadows and affect alpha ticks.

[Andrew Roane]

Buena onda, esto me ayudo mucho. I lived in Xela for 2 years, which is beside the point, but I did notice that you are in Guatemala. Thanks again for the help.

[jafs00]

You're welcome Andrew. I live in "la capital", but visit Xela as often as I can, I really like it there, I hope your stay in our country was a pleasant one. Be sure to come back when you can!

[devres]

I have a further question about this.

 

I had a problem recently on an interior render (I'm very new to Vray)

 

I had a glass material that let light through NO PROBLEM. BUT, only direct light from an actuall light. So it would illuminate anything in it's path.

 

However, it was NOT letting the "environment" light though? The scene looked the same with an environment setting of 1 as it did with 50?

 

My solution as I didn't have much time was to simply delete my glass (nobody even noticed by the way)

 

Thanks for your time.

[alias_marks]

I've had this same lighting question before and found a great resource I highly recommend you look through. Here's a direct clip from the page that addresses your qeustion somewhat.

 

" 1. If you use only object lights and Vraylights and you want caustics:

- enable GI caustics

- use good quality GI settings to make sure the caustics look sharp.

 

2. If you use max lights and you want the light to pass through refractive materials:

- use the affect shadow option for a fake caustic effect

- OR enable caustics in the caustics rollout and play with the settings for photon

mapped caustics.

 

3. If you use Vraylights and you want photon mapped caustics:

- Disable affect shadows

- Disable GI caustics

- Enable caustics in the caustics rollout and play with the settings."

 

 

As always there's many ways to do one thing so the best option probably varies.

 

*note - I do not take credit for the text in green. It is a direct quote from a tutorial on the Aversis webpage.

 

I highly recommend you go through the Vray tutorials here to help answer your questions - http://www.aversis.be/extra_tutorials/00.htm