PDA

View Full Version : Material mysteries



broli
07-23-2006, 07:13 AM
Well hello there again guys. Recently I have been working on this test scene that pretty much needed some materials knowledge. Since that's not really my area of expertise, I'm a bit struggling with trying to get what I'm looking for.

Basically Iím trying to use procedural materials to attain my goal but looks like my lack of knowledge and experience is making me fail. Here are a few examples of what Iím trying to aim forÖ

http://img100.imageshack.us/img100/7637/androidislands0op2.th.jpg (http://img100.imageshack.us/my.php?image=androidislands0op2.jpg)
http://img86.imageshack.us/img86/4602/kais03mg5.th.jpg (http://img86.imageshack.us/my.php?image=kais03mg5.jpg)
http://img160.imageshack.us/img160/5397/randomterrain6ja8.th.jpg (http://img160.imageshack.us/my.php?image=randomterrain6ja8.jpg)

These are my takes on trying to get something like itÖ

http://img91.imageshack.us/img91/8616/test5ph0.th.jpg (http://img91.imageshack.us/my.php?image=test5ph0.jpg)
http://img153.imageshack.us/img153/5624/test10tn8.th.jpg (http://img153.imageshack.us/my.php?image=test10tn8.jpg)

Basically I want to procedurally generate a material for the ground plane that looks like these examples ie. all smudgy and brush like made. Since I donít know what Iím doing Iím just applying random stuff to it and trying to scale it or add extra layers till I have something that Iím stratified with, which is by far the worst working method :p.

Lastly I want to say this; it would be nice to have an active irc channel of some sort where people can resort to for many smaller questions. Iíve been to this one lightwave channel which was straight forward dead. With such a large community an official channel will be an excellent addition imo.

Matt
07-23-2006, 09:47 AM
I'm no procedural expert, but one thing you might want to try is having the scale of the procedural longer in one direction, if you look at the images you're trying to match the darker patches are spread out more, it looks like you have yours uniform.

The other thing to try is add one procedural at a time (maybe use different ones until it looks right) then add another (with others switched off) etc.

I found myself lost in procedurals when I've added a few and I'm tweaking but can't really see what effect it's having.

Re: IRC

The one IRC channel I know of is pretty quiet, depends when you log on, but I agree a more active one would be cool.

Matt

Exception
07-24-2006, 02:37 AM
First off, turbulence is a great procedural, but try going for something a bit more irregular such as Hetero Terrain.
Second, you can use a gradient to make the output of the procedural stepped rather than smooth... that would work werll..
Also what Matt says, try stretching it into one of the length directions...

Lots of us cant use IRc cos we're at work :)

broli
07-24-2006, 03:13 AM
Yeah I have been playing with turbelence with a combination of a gradient and this is what I have so far...

http://img127.imageshack.us/img127/3818/test16ew4.th.jpg (http://img127.imageshack.us/my.php?image=test16ew4.jpg)