Light not passing through surface

[bobvelocity]

I have a massive problem in that I can't get light to pass through an object. I have a sphere with thickness with a clear glass shader on. Inside this is another sphere with a simple diffuse texture on. I have affect shadows on and pretty much everything else I should. Does VRay not raytrace shadows or something. Someone please help. I just want to be able to see the object inside lit. Surely this is normal?

[bobvelocity]

The only way I seem to be able to see the surface properly beneath in tuning off visible in refl and refrac of the other ball. Which is good but not right.

[bobvelocity]

Turning off generate and recieve gi for the outer bubble seems to be working. I'll just answer my own problem I guess.

[yolov]

Hi bobvelocity,

Can you post a sample render or a screenshot of your shader settings? What shader are you using on the outer sphere?

Best regards,
yolov

[bobvelocity]

Thanks for your reply Yolov but I don't have time to sort a sample out at the moment. I have something that's working for now but will come come back to you on this next week for sure. I need to get the bottom of it. It seems like the GI won't pass through the glass surface. Anyway, like I say hold tight till next week.

[Dariusz Makowski (Dadal)]

U sure you have enought ray trace depth? Hard to suggest what to fix if we dont have technical details...

[bobvelocity]

I've now attached an image of my problem. Same glass shader on both spheres. The red sphere is behind then inside on the right. Sphere inside goes dark. GI not passing through glass.

[yolov]

Hi,

Here's a quick example: . I'm guessing that's the result you're after. On the outer sphere I used VRayMtl with pure white for reflection and refraction, Fresnel reflections and affect shadows "on" for refractions. What shader are you using?

Best regards,
yolov

[bobvelocity]

That's what I want yes. I've done exactly the same as you. But my inner sphere still goes dark. Maybe my VRay is broken?

[bobvelocity]

Mine is the same when I turn off GI.

[yolov]

Can you post a screenshot of the shader settings for the glass material or post a sample scene that doesn't render as expected on your end? Also any info on the Maya/VRay versions will be helpful?

Edit: Come to think of it, you mentioned disabling "generate/receive GI" in the vrayProperties on the outer sphere before. Are those options still off ?

Best regards,
yolov

[bobvelocity]

Did your do yours with GI on Yolov?

[bobvelocity]

My glass shader is out of the box created the same as yours. Receive and generate GI are still on in the object properties. Normals are correct and the geo has some thickness. I'm not doing anything out of the ordinary really. I'm using maya 2012 sp2 VRay 2.20 and have been for the last couple of years and never noticed this problem before. The glass doesn't need the GI I guess but having to turn this off on loads of different objects is a bit of a pain. Is this just the way it has to be?

Regards

Keith

[yolov]

Yes, I used GI for the sample image. Another possible reason for this that comes to mind is, that the inner ball has the same radius as the outer ball's inner part - the geometry is intersecting - in this case the inner (red) ball would be a bit darker. Here's an example:

Intersecting geometry:

Red inner ball is slightly smaller than the outer glass ball:

Is that the case in your scene?

I hope this helps.

Best regards,
yolov

[bobvelocity]

My inner ball in smaller. Where can I upload my scene for you?