Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: fa2020 on 2019-03-12, 09:39:24

Title: Curvature shader
Post by: fa2020 on 2019-03-12, 09:39:24

Hi guys,
How can we have render time curvature shader without any uv map? This capability comes in handy when we want to render sculpturs or 3d scans while it does not have any uv. Data Channel also does not work well. It uses huge amount of RAM, as well.

Title: Re: Curvature shader
Post by: pokoy on 2019-03-12, 09:45:54

Add your request to one of the existing curvature map request threads, this has been requested quite a lot in the past.

Title: Re: Curvature shader
Post by: dkid on 2019-03-14, 05:41:45

by Curvature Shader mean "edge wear and tear" then in Corona you can do it with CoronaAO map and input bitmap in one of the AO node to add more realism. YT got more tutorial on that simply search it.

Title: Re: Curvature shader
Post by: sprayer on 2019-03-14, 06:17:14

Quote from: dkid on 2019-03-14, 05:41:45

by Curvature Shader mean "edge wear and tear" then in Corona you can do it with CoronaAO map and input bitmap in one of the AO node to add more realism. YT got more tutorial on that simply search it.

they similar but not the same, this is curvature example
http://www.stepanjirka.com/wp-content/uploads/2016/06/curvatureCover-e1468918041668.png

Title: Re: Curvature shader
Post by: romullus on 2019-03-14, 11:20:51

Quote from: fa2020 on 2019-03-12, 09:39:24

Data Channel also does not work well. It uses huge amount of RAM, as well.

Is this true? AFAIK, curvature should be pretty inexpensive shader to calculate.

Title: Re: Curvature shader
Post by: maru on 2019-03-14, 16:03:04

There is no out of the box curvature map in Corona yet. Dubcat came up with some ideas how to get it: https://forum.corona-renderer.com/index.php?topic=13398.msg86428#msg86428