Chipped/Weathered/Rough edge

[lazardanilovic]

Hi everyone, first of all hope you are having a great day. I've been using corona for about year and a half now, mostly for interior, but i have recently started doing exterior renders. I've been trying to create effect of rough edges, on the cast concrete mostly but could use it for other examples aswell, i tried using corona curvature map to create a mask just for edges which i would use to isolate a displacement map and apply it just on said edges but it doesn't seem to A) work as well as i would hope and B) mix with other surface bump/normal/displacements i have. I've attached a WIP of a scene where i was practicing this. As you can see it is barely noticeable.

So if anyone has some experience with it, or has idea how to do it possibly I would be very grateful!

[Tom]

Hi,

Using a curvature map as a mask should definitely work. Try tweaking its settings to get the desired mask and you should be fine.
You can also have a look at this thread: https://forum.corona-renderer.com/index.php?topic=40773.new#new

Hope it helps,

[lazardanilovic]

Hey Tom,

Thank you for your reply, i somehow completely missed this thread. For the life of me i couldn't get the curvature mask to work, but I've had more luck with the Data Channel, overall it works better and its closer to what i want, but I do have slight issues with it. I've provided the close up image of what i think, I've pretty much copied your setup from the post you provided, and for some reason my chamfer seems to be "splitting"? Or that is the best i can describe it, it doest seem to project dispalcement evenly and it looks like its treating it as a split mesh I guess, but mu knowledge is limited.

[romullus]

Try to add small bevel to the edges, that should help with displacement artifacts.

[lazardanilovic]

I seem to have fixed it by reducing segments on chamfer modifier from 1 to 0 and reducing the size to almost nothing 0.01-0.05