Gloss and specular mapping using textures

netkoji · Post by **netkoji** » Tue Jul 21, 2009 1:51 pm

Greetings board!

I was wondering: is it possible to do gloss and specular mapping using a texture as a mask? I need this to render a photo-realistic model of a table with peels of paint over it (which would shine and have a different texture than the old and worn parts of the table). I know that irrEdit doesn't support it but maybe there's a different way to do it in Irrlicht itself?

Also, do you guys know of any alternatives to irrEdit that could fully (or mostly) support all of Irrlicht's features (such as the aforementioned mappings if they are possible to do)?

Thanks!

Hirte · Post by **Hirte** » Tue Jul 21, 2009 2:15 pm

Yes, it is possible. I think you can use 4 textures per object; you'd have to write your own shader/material though.

hybrid · Post by **hybrid** » Tue Jul 21, 2009 3:24 pm

If you don't want to use shaders you have to put the paint blobs into geometry. Either give those parts a different material, or use the vertex color for specular color (this material switch is available in SVN/trunk, aka Irrlicht 1.6). But since you mention photo realistic I guess you must use a shader.

netkoji · Post by **netkoji** » Tue Jul 21, 2009 5:05 pm

Is there any scene editor that could facilitate the process? IrrEdit doesn't help much here even though it supports loading up to 4 textures.

hybrid · Post by **hybrid** » Tue Jul 21, 2009 9:48 pm

The fixed pipeline way would require a 3d modelling tool, the other one a shader editor. Both is not possible with irrEdit, but is also not the job of irrEdit.

BlindSide · Post by **BlindSide** » Wed Jul 22, 2009 1:29 am

This shader can do specular mapping:

http://irrlicht.sourceforge.net/phpBB2/ ... malmapping

Hirte · Post by **Hirte** » Wed Jul 22, 2009 9:22 am

Are you sure? This shader contains only 2 textures, one diffuse and one bump...

BlindSide · Post by **BlindSide** » Wed Jul 22, 2009 9:58 am

Ah it looks like he posted the specular mapped version in a later post: http://irrlicht.sourceforge.net/phpBB2/ ... 565#117565

Hirte · Post by **Hirte** » Wed Jul 22, 2009 10:00 am

Oh, sweet. Thank you;)