testing out dirts

[acc24ex]

just love that dirt shader, versatile stuff
- been doing a custom black paint material for a project and came up with this

[daveyt]

looks really nice. maybe a little dark

[acc24ex]

thanks..
- and yes, I'm doing the black on black, tend to get dark, but looked just black enough if I up the exposure doesn't look as good
- the material is pure 0 black but with glossy and roughness and bumps.. it probably depends on the brightness of different monitors now, on 2 of mine looks ok, now I'm not sure how it looks on others

[Andreas.visjon]

Hi,

also here, it is to much dark. Try to calibrate your monitor.
Anyway, cause there is no 100% black or white (color) in nature, you shouldn't use pure 0 black, try 3% or 5%.

[acc24ex]

.. thanks, then, I'll check, I usually check against a mobile phone or ipad, like an average monitoring device
- yes I know that pure black is usually a no go, but this one had more glossy stuff, usually it seems fine with specular
and roughness, pure black means absolutely no light bouncing usually..

[martincarlson]

just love that dirt shader, versatile stuff
- been doing a custom black paint material for a project and came up with this

Would love to learn that dirt technique. Dirt map in Roughness-channel? With some Mix textures? How?

[acc24ex]

hi, check out some downloadable files at this post everything uses similar technique..
http://render.otoy.com/forum/viewtopic.php?f=6&t=40811

like, add two shaders in a mix shader, and control via dirt texture, set to inverse for edge scratches, one main material , other glossy with more bump .. and play with settings.. the shaders in the above link will get you started..

[martincarlson]

Thanks dude! Watched your brilliant tutorial and tried your techniques.

Here's some test shots:

[acc24ex]

you got it

- now think how to add irregularities in those scratched edges - think of the other texture that having irregular glossy diffuse texture or ireggular specular texture ..

[martincarlson]

you got it

- now think how to add irregularities in those scratched edges - think of the other texture that having irregular glossy diffuse texture or ireggular specular texture ..

Well - HOW do I make theese irregularities on the edges? See my attached example of some kind of painted wood with weathered edges. The edges are to "straight". How do I fix this? I'm trying to do it as in the tutorials but i'm missing something. Want to achieve something like a map in Vrays Dirt channel.