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Two questions about Maxwell

Posted: Thu Jul 14, 2005 5:38 pm
by j_petrucci
Hi,
I'm working on some MXI lightning images, but I have a pretty slow computer (Pentium-III 800Mhz) and I can't render at levels that make caustics clearer, so I'm asking if light coming from MXI can produce caustics like any other emitter... :roll:

and the other thing: is Maxwell capable of correctly reproduce Fresnel effect, i.e. incident-angle dependant reflection?

Image

and thanks NL for one of the greatest gift ever made to the CG community! :D

Posted: Fri Jul 15, 2005 7:33 am
by Hervé
good fresnel for Dielectrics... and little less for plastics... but it's in there already....

although it would benice to have a way of controlling it... with a gradient for instance...


Caustics from hdr_MXI emitters are not so strong... but it's there.......

Posted: Fri Jul 15, 2005 7:57 am
by j_petrucci
Hervé wrote:good fresnel for Dielectrics... and little less for plastics... but it's in there already....
how can it be obtained?

Posted: Fri Jul 15, 2005 8:55 am
by Hervé
You cannot switchit on or off the fresnel... it is "coded" into Maxwell... :D