OTOY Forums

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

Something like this?

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!

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

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...

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

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

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, i say thank you too Very nice shader.