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popol
02-21-2004, 09:58 AM
hi i 'm new on mental ray and i try to render some coloured

caustics on my scene How can i do that ?

sorry for my english

NightCrawler3d
02-21-2004, 02:18 PM
well there will be a tut by jozvex in the future
http://www.jozvex.com/tutorials.html

come on jozevx im waiting for it too
:buttrock:

Atwooki
02-21-2004, 11:08 PM
popol:
This might help you:

http://www.3dluvr.com/intercepto/maya/tutorials/mray_caustics/caustics_introduction.htm

Atwooki

popol
02-21-2004, 11:36 PM
thanks you Atwooki i thing that can help me

and yes Mr Jozvex im waiting for this tutorials too

(very nice work
:thumbsup: )

bmcaff
02-22-2004, 12:17 AM
It's really quite easy. Just change the specular colour of the photon shader (caustics is all about specular reflection and refraction so best to keep diffuse low or off). You can map it with a texture if needed. Here is a quite example (photon energy is twice that of light energy to show the effect more clearly). It shows both refractive and reflective caustics on various DGS shaders.
http://www.bmcaff.com/post/colouredcaustics.jpg

Jozvex
02-22-2004, 12:56 AM
Yes bmcaff is right,

If you add a DGS_Material_Photon shader to the Photon slot of your material's Shading Group node, choosing the colour of the Specular attribute will set the colour of the caustics.

And yes, adding textures can create some great caustic effects!

:thumbsup:

popol
02-23-2004, 12:54 PM
thank you :applause:

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