Corona Curvature Map playground!

[maru]

We have the long-awaited Corona Curvature Map in our newest daily build!
You can check the full changelog and grab the installer here: https://forum.corona-renderer.com/index.php?topic=33839.msg194357#msg194357



This is an early implementation and it may still change based on your feedback, so please let us know what you think about it, what is great, and what isn't.
We are also very interested in the differences you notice between the Corona AO and Curvature, and when exactly you would choose to use which.

Basic usage:
Create a new Corona Curvature Map in the material editor.
Plug it into any material property you wish, or use it as a mask to mix various properties/materials.

An example where AO and Curvature produce a similar result:
https://corona-renderer.com/comparer/ZYyww6

An example where AO and Curvature produce a visibly different result:
https://corona-renderer.com/comparer/fHEmkv

[romullus]

I'm very happy to finally get Corona curvature! Few small notes from initial testing:

• default max distance of 100 units is way too much, i think 1 unit would be more sensible default.
• distance should be mapable, like it is in CoronaAO.
• someone already mentioned issue, where convex colour can't be darker than base colour.

[marchik]

I'll duplicate it here again, please add an option to ignore the bump :D

[scionik]

Hi devs, thank for new CurvatureMap, it works fine with black base color but doesn't with white. Please see attachment for more details... Or I do smt. wrong?

[rowmanns]

Hi devs, thank for new CurvatureMap, it works fine with black base color but doesn't with white. Please see attachment for more details... Or I do smt. wrong?

Hi,

Reported and we'll look into it.

Thanks.

(Report ID=CRMAX-1252)

[rowmanns]

I'm very happy to finally get Corona curvature! Few small notes from initial testing:

• default max distance of 100 units is way too much, i think 1 unit would be more sensible default.
• distance should be mapable, like it is in CoronaAO.
• someone already mentioned issue, where convex colour can't be darker than base colour.

Thanks, I have logged these and will discuss them with the devs.

(Report ID=CRMAX-1253)
(Report ID=CRMAX-1254)

[rowmanns]

I'll duplicate it here again, please add an option to ignore the bump :D

Hi,

I have logged this too. Will discuss with the devs.

(Report ID=CRMAX-1255)

[romullus]

Some tests. Basic metal with falloff vs metal with curvature. I think the latter looks better, but also is slower to render.

[romullus]

Bug report: artefacts appear on thin wall mesh, when curvature's max distance is larger than wall thickness.

[GeorgeK]

Bug report: artefacts appear on thin wall mesh, when curvature's max distance is larger than wall thickness.

Nice catch, reporting it.

(Report ID=CRMAX-1260)

[Feodor]

Hi!
I would like the parameter to take into account the "smoothing group" Or the angle of inclination of the polygon.

[romullus]

My tests shows that curvature is taking into account smoothing groups. Angle threshold would be useful control indeed.

[romullus]

Couple stylised materials with curvature.

[scionik]

Great, thanks for added Blend method Looks much better. It would be awesome to have AO effect with intersecting meshes (different objects).

[scionik]

Adding a curvature map to material causes an error and crash while IR is going on