Glass problem

Support Basics & Interface
1

Hi there,

I’m trying to render a girl’s room where there’s a picture of her in a frame on top of her bed, and there’s a glass in front of it.

However, I can’t see the picture unless there’s sun hitting it directly. What could I do about this?

You can see the render in the picture bellow, and also the glass material itself.

Disabling caustics didn’t help.

Thanks.

Picture: https://i.imgur.com/NBtkOwA.png

2

Don’t use glass shader (it uses refraction which is not needed here). Setup a custom thin sheet glass material instead using layer weight/facing to blend between transparent shader and glossy:

  • Refraction will typically fail with wrongly setup normals or thin sheet glass.
  • Transparent shader doesn’t work (easily) with fresnel, hence the layer weight/facing workaround.
  • Glass material doesn’t have separate controls for refractive and glossy color.

Alternatively it could just be a case of adding glass with a transparency shader. Depending on the model, it might be just the trick, but speedwise you can’t beat the thin sheet glass material described above.