View Full Version : Raytrace Material
BigNasty 08-22-2002, 01:26 AM Can anyone help me out here? I am trying to figure out how to make the illusion of rice paper using the raytrace material.... it would be easy if we could use lights and stuff, but the assignment is to use the Raytrace material...... Here's a picture, just so you know what I'm talking about...... Look at the lamps and the tri-fold wall thing..... I need to learn how to do that? Anyideas cuz I keep playing with the map but I just can't get it to look right.....
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BigNasty
08-22-2002, 01:30 AM
and here's what I have so far...... nothing is textured except the back wall and the "rice paper" parts of the Wall thing and the lamp....
Chris
08-22-2002, 01:45 AM
you might want to clarify this with your tutor a bit, The only reason I could think of for using the raytrace material on this is so that you can use the 'transluscency' function of the raytrace material. Thats fair enough & should work fine, but only with lights. You would just put a spotlight behind it, & play with the hotspot & falloff, then adjust the transluscency settings till youve got it right. But if he's saying it should be done without lights - you are going to have to use luminosity on the raytrace material. Except there is no point, you could equally do it with the self illumination slot of a standard material & have it render twice as fast... :shrug:
BigNasty
08-22-2002, 01:51 AM
Originally posted by Chris
Except there is no point, you could equally do it with the self illumination slot of a standard material & have it render twice as fast... :shrug:
That is what I was thinking........ simple self illumination, slight transparency, and a light behind it should have been ok... but oh well... I'll try out your suggestions... THANKS
BigNasty
08-22-2002, 06:12 PM
Here's what I came up with.... :hmm:
Marcel
08-22-2002, 07:10 PM
Translucency in the raytrace material sucks, it doesn't do what it should do (or at least, what I expect it to do :) ).
What you could try is putting a 'thin wall refraction' in the refraction slot. This is a map especially for of objects that are not very curved (like the lens of a spectacle for example). The advantage of using this kind of map is that you can easily blur the refractions (play with the blur and the blur offset values)
Now place a sphere (along with a omni) in the paper light with a high intensity material (place white gradient in the self illumination map and set output->rgb level to 5). I think the blurred refraction would make it look like rice paper.
(Also, adjust the falloff on the omni so it has the effect as in the photo)
Good luck!
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