[seghier]

i wish maxwell team separate hide from refl/refr
to hide from refl ..... hide from refr
-------
create render with transparent background without using alpha and photoshop
http://code.google.com/p/openshadinglan ... xpressions

[eric nixon]

With unbiased rendering reflection and reflection are kind of the same.

It is possible to render just reflections, it depends what your trying to do. you can use matte option in material editor to control where the alpha channel goes (put the matte object behind the glass), or maybe just make a reflective black material with no refraction. Or a glass material with no reflection.

In my experience this sort of compositing is quite easy to do in maxwell,... just needs a little experimentation.

[seghier]

thank you eric for the tips ; that help me with materials
what i mean it for example : i create glass object and create light source
i want see only the refraction without reflection of the light in the glass. but maxwell don't allow that when i hide the light from refl/refr

[Mihai]

I'm not sure what you mean by:

i want see only the refraction without reflection of the light in the glass

What would a refraction of the light look like as seen inside the glass? Do you mean you want to see the emitter surface through the glass?

[seghier]

hello Mihai
sorry for my language
i give you example i try it in actual competition
i create glass of water and square as source light
when i test render i see the reflection of the square in the glass so i hide it from refl/refr
and render again . glass don't reflect the square and don't affect refraction

[eric nixon]

glass material with no reflection

Have you tried this? a transparent (glass) mxm with no reflection (black R0 & R90).

[seghier]

i will try that . thanks eric