topic Re: Position-based Weathering in CineRender in Visualization

Position-based Weathering in CineRender

derekjackson — Thu, 11 May 2023 09:38:02 GMT

Hi,
I'm wondering if there's a way to achieve weathering effects based on proximity to an edge of a polygon. From what I can tell, the Weathering shader effect just smears a texture over the whole surface - I'm wanting something that takes account of position on the surface (for example, to do darker edges on asphalt roads as they near the kerb)

Is there a way of achieving this? Either through the Weathering effect or some other shader type?

Thanks.

Re: Position-based Weathering in CineRender

Erwin Edel — Wed, 28 Feb 2018 09:54:43 GMT

https://helpcenter.graphisoft.com/guides/archicad-21/archicad-21-reference-guide/user-interface-reference/dialog-boxes/detailed-cinerender-settings/cinerender-effects/ambient-occlusion-cinerender-effect/

This?

Re: Position-based Weathering in CineRender

derekjackson — Wed, 28 Feb 2018 15:54:18 GMT

Thanks - I'll explore that for concave edges. It may not work for convex edges though...

Re: Position-based Weathering in CineRender

Lingwisyer — Thu, 01 Mar 2018 02:39:55 GMT

Ambient occlusion is more about light penetration into corners... so it won't give you that much flexibility in creating a weathered effect to the edges of your materials. I have yet to find something like VrayDirt on the Cinerender Engine which can do what you're wanting...

Ling.

Re: Position-based Weathering in CineRender

Erwin Edel — Thu, 01 Mar 2018 07:55:45 GMT

There are two instances of AO: applied to the whole scene as an effect or applied as a procedural shader in surface channels.

This means you can use it as a layer to affect a texture, weathering effect etc, from what I understand from the help article I linked (scroll down all the way to the bottom).

Concave / rounded edges won't work most likely, as they are just a lot of small straight segments in the end.