CGTalk - bump maps and noise

JasonA

01-24-2003, 07:14 PM

I'm noticing that whenever I add a bump map to a texure, the resulting bump effect is very "noisy" and speckled. Even tho the image itself is very crisp. I've played around with the filtering, but I seem able to blur the image out, and then the bump is not as defined/useful.

I'm probably doing something wrong, but why does the default bump settings look so crappy?

mattwood

01-25-2003, 01:26 PM

This may be very patronising so I apologise in advance, but you're not using jpeg images are you?

JasonA

01-25-2003, 04:48 PM

no problem, I'm interested in exploring everything. But no, I'm using GIF's since the bumps are relatively simple and just b/w.

Does Maya not like JPEG files or something?

JoeSchmo

01-25-2003, 05:18 PM

jpegs are ok if they are good quality.
it could be your geometry...
if NURBS have a big space between the isoparms
it could be stretching the texture ...
it could be a lot of other stuff too
its very hard to tell without seeing some
pics
Joe

beaker

01-25-2003, 08:26 PM

Gif is only 256 color, so if you have alot of gradients in the b&w, it could be banding and causing the artifacts you are refering to.

CGTalk Moderation

01-14-2006, 06:00 AM

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.