Dust

[Diz1]

Hi

I'm trying to create a dust effect, where a diffuse material lies on top of an object. In non-octane world I go to my C4d material Alpha>Texture and apply a Falloff gradient in the y direction, hey presto I have dust settling on the top of my object.

How would I do this with an Octane mix material? falloffmap faces the camera, so I can't see it's that. Any help would be gratefully appreciated!

Thanks
Diz

[bepeg4d]

Something like this?

[Diz1]

Ciao bepeg4d!

Thanks very much for your time with this. Thanks to you I have discovered what the Sine Wave texture generator does! However, I am having trouble assigning a suitable transform to my model, I get the effect on a primitive but not for my model. Would it be possible for you to PM me your scene, so I can understand the voodoo that it is at work here? I noticed for the arms on your figure that the 'dust' is settling at the ends and not the top of the mesh, so presumably I would have to apply a different material if any part is oriented differently?

Grazie mille per il vostro aiuto!

[aoktar]

you can check projection types. There is also xyz(world) transform

[Diz1]

This is the effect I'm after:

Sorry, I'm still failing to see how I can set this up!
I guess what I need is a way of using a normal to control the opacity...

[bepeg4d]

hi Diz,
yes you are right about the position of the dust on the arms... i was too lazy to fine tuning the projection on arms and feets
this way works better for simple geometry, here is the scene corrected so you can check:

Dust_0001.c4d.zip

(143.71 KiB) Downloaded 318 times

for complex geometry is better to use the dirt node for driving the dust.

Dragon-Dust.c4d.zip

(1.45 MiB) Downloaded 323 times

[pBarrelas]

bepeg4d,
thanks for taking the time to setup these scenes. Your techniques works very well to get this effect in a procedural manner.

[Diz1]

Great! Thanks very much for taking the time to do this bepeg4d, it is much appreciated. I see there are a few downloads, so hopefully others will benefit also.
Diz

[bepeg4d]

[djart]

@bepeg4d, i say thank you too Very nice shader.