where is roundcorner material

[khoscorona]

where is roundcorner advanced material in corona 1.3

[dubcat]

It's a corona map now. Use it in the bump slot.

[khoscorona]

ok tnx. but do you have tutorial about how to mix main bump and roundcorner map

[dubcat]

Throw the main bump into the "Additional bump" slot in the CoronaRoundEdges map :)

[selant]

by the way, i never heard about what roundercorner material is.. where can i get info about it ? what is it used for ?

[DarcTheo]

by the way, i never heard about what roundercorner material is.. where can i get info about it ? what is it used for ?

It rounds the edges of an object during the render. I think it's like doing a chamfer but during the render.

[maru]

Here: https://coronarenderer.freshdesk.com/support/solutions/articles/5000544506
Basically it's something like inverted AO used as a bump map. ;)

[selant]

oh very cool thing, never heard something like this as material.
It reminds me my use of  - TurboSmooth  with "0"(zero) in the viewport, and "2 - 3" during render. ;)
Thanks for valuable info.

[maru]

oh very cool thing, never heard something like this as material.
It reminds me my use of  - TurboSmooth  with "0"(zero) in the viewport, and "2 - 3" during render. ;)
Thanks for valuable info.

No, it's something completely different. It's just a shading effect, it has no impact on the geometry.
And it's present in most (?) renderers out there.

[Juraj]

Hi Maru, can I ask you:

To get full effect of 'rounder corners', the bump value should be at "1" ? I remember Ondra stating 1 does not equal 100perc. like other maps, but merely arbitrary strength, but in this case, that's what it works like not ?

So to mix 0.05 micro bump, plus full Rounder corners one should do 1.0 in bump, and then 0.05 strenght for subbump.

Because this is not what I think most people do or what the converter does (but need to check), so it might end up opposite, which is okay for sub-bump (the original micro bump map) but rounder corner will not work well.

Eh...sorry for so confusing and convoluted write-up...

[maru]

I am not sure, Ondrej would have to verify this, but it looks like you can just place the rounded corners map in diffuse channel and see what happens when you change different values. So for bump channel the same happens, only translated to the bump intensity.

I can understand the problem with converter. So basically what it should do is place the original bump value in the sub-bump instead of the overall bump value, right? I will try to check how it works.

update: yeah, the converter does something strange to the values, at least when converting from mental ray

[romullus]

I am not sure, Ondrej would have to verify this, but it looks like you can just place the rounded corners map in diffuse channel and see what happens when you change different values. So for bump channel the same happens, only translated to the bump intensity.

That is a very nice trick. Never thought about it. Thank you, maru!

[maru]

No problem. That was the first thing I did when I heard about this map for the first time. ;)

[romullus]

I hoped that it may be lighter AO alternative when you need just weathered corners, but it looks like roundCorners is even a bit slower then AO. Nevertheless it's good to know that i can plug it into diffuse just for checking wether it's worth to use on certain model or not.

[Juraj]

is even a bit slower then AO

How much ? I tend to use this heavily now, but didn't do any benchmark on how taxing this feature is.

[Freakaz]

Somehow i just simply can not overcome myself and use this map instead of quad chamfer. It was fast to set it up when round corners was not a map, to be used in a bump slot, now it became somehow complicated for my lazy ass :).

[romullus]

Not much, 5-10% maybe. But i didn't do in depth tests, i just did make sure that both has same radius and sampling level and pluged those maps into diffuse slot. Tested on boxes and teapots. In real scenes, results may be wildly different.

Somehow i just simply can not overcome myself and use this map instead of quad chamfer. It was fast to set it up when round corners was not a map, to be used in a bump slot, now it became somehow complicated for my lazy ass :).

If you can afford chamfer than go for it. Round corners will never match it.