Well, I promise that if I find more questions, I'll probably group everything into one thread... Anyway.

Still I'm confused about Mia_material implementation... I always have doubts on some aspects, so I can't figure out if I discover bugs, or I'm just (more likely) missing something about 3Delight workflows

This time I have problem with refractions.

I have 2 simple models, 2 bowls. Geometry is fine, and I added visibility attr so they are visible to raytraced shadows, occl rays and specular rays. I added one directional light, with RT shadows.

I assigned a simple Blinn to one bowl, and a mia_mat to the other. Setup some parameters to simulate glass, and for renderman's sake, If I try to achieve "white colorless glass", raytraced shadows just disappear.

Ex:

Here's the scene, the bowl on the left is the Blinn (looks quite bad), on the right the Mia material. If I leave the "color" parameter under the refraction tab at white, I get no shadows.

No shadows:
https://docs.google.com/open?id=0B8EjKX … ERhb2pQdVk

By tinting the glass, it shows shadows
https://docs.google.com/open?id=0B8EjKX … mZYUHU3NDg

And some more
https://docs.google.com/open?id=0B8EjKX … U9KWkNld0E

So Am I missing something, or I should be able to obtain white glass with shadows without problems? (btw, there are no photons or other fancy stuff casted into the scene, it's a "fast image based lighting" with an envmap and nothing more)

Question number 2:
how can I map textures to the glossiness value of the Mia material? As soon as I connect a texture in the slot, the material cease to render (showing the renderman default mat)

No glossy:
https://docs.google.com/open?id=0B8EjKX … W9VeDlqN1U

Thanks in advance