Thanx to Erric (Mosaic developer) for his guidance.
info regarding setting up glass material, in the words of erric :
If your talking about refraction you will need to setup the materials
IOR and Fresnel for the materials RayTransp tab (also RayMir and its
Fresnel if you want reflections), be sure to DISABLE both "Ray Mirror"
and "Ray Tranp" toggles or MOSAIC will think its supposed to export
raytracing. One thing to keep in mind when doing this is the
environment map only sees what "outside" the glass so you will not be
able to see what's "inside" in the refraction (like the flame and lamp
base). You can get around this by turning down Alpha on the material
however this will also "fade out" the reflections and refractions.If you want the reflections to be solid and the fresnel to be "see
through" you can do a trick by enabling "TraShadow" on the material and
MOSAIC's shaders will use the fresnel to adjust the output alpha. I
know this is a little confusing so here's some examples...
This
test scene is using a texture mapped ground plane, a sphere using an
environment map with reflection/refraction and dented.sl displacement,
with a cube inside the sphere. This first render shows the effect
without alpha applied (notice you can't see inside the sphere):
And this is my RENDER ...
And the tutorial how to make it..
