Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] Feature Requests => Topic started by: prince_jr on 2020-11-14, 10:45:20

Title: dirt (streaks) like vray 5
Post by: prince_jr on 2020-11-14, 10:45:20

hi all
i just watched a video on youtube about vray 5 and dirt map...

most of my 3d-work is architecture. dirty concrete is something i use regularely, especially making dirt steaks. at the moment i always end up to add them in photoshop manually.
i'm aware of "ambient occlusion" as a solution, but it is just not the same. vray dirt seems to be much more powerful and realistic.

question to the developers:
are there any thoughts about implementing this feature in the future?
when can we expect something similar in corona renderer to get same results?

thanks in advance & stay safe/healthy

Title: Re: dirt (streaks) like vray 5
Post by: romullus on 2020-11-14, 12:18:00

I think it's nothing more than procedural noise map built-in into AO/dirt shader. It's perfectly possible to achieve the same effect with CoronaAO.

(https://forum.corona-renderer.com/index.php?action=dlattach;topic=31552.0;attach=137376;image)

Title: Re: dirt (streaks) like vray 5
Post by: Jpjapers on 2020-11-14, 14:12:16

Would be even better if corona had a raytracing API and we could finally have richdirt support :)

Title: Re: dirt (streaks) like vray 5
Post by: prince_jr on 2020-11-14, 14:26:19

okay...thanks for the hint, romullus!
i gave it another try. it look okay. surely need to fine tune the settings.
but i'm still struggeling with a specific thing > still having parts, where ambient occlusion shouldn't be applied (see attached image).

by the way...i'm a c4d user. ;o)

Title: Re: dirt (streaks) like vray 5
Post by: prince_jr on 2020-11-14, 14:45:33

@Jpjapers that's for our input! this plugin looks amazing.
but here we go again...no support for cinema 4d at all. :o( cinema 4d is really a downside, when it comes to plugin support.

Title: Re: dirt (streaks) like vray 5
Post by: romullus on 2020-11-14, 15:35:14

Quote from: prince_jr on 2020-11-14, 14:26:19

i gave it another try. it look okay. surely need to fine tune the settings.
but i'm still struggeling with a specific thing > still having parts, where ambient occlusion shouldn't be applied (see attached image).

Try to increase ray directionality - it should help with those problematic corners. Also you can play with colour spread. One last thing to try - plug Corona colour correct between AO and material and tweak its curves to achieve desired look of the streaks.

Quote from: prince_jr on 2020-11-14, 14:26:19

by the way...i'm a c4d user. ;o)

I noticed, but this shouldn't be a problem, as long as C4D has some procedural noise map :]

Title: Re: dirt (streaks) like vray 5
Post by: Jpjapers on 2020-11-14, 21:36:49

Welp. I was in the wrong help boards. Thought this was in Max.
As you were!

Title: Re: dirt (streaks) like vray 5
Post by: prince_jr on 2020-11-15, 13:17:45

another test...quite happy with the result. :o)

Title: Re: dirt (streaks) like vray 5
Post by: leo3d on 2020-11-15, 21:37:52

Hello could you share your Node Materiel

Thx

Title: Re: dirt (streaks) like vray 5
Post by: prince_jr on 2020-11-16, 08:52:36

Quote from: leo3d on 2020-11-15, 21:37:52

Hello could you share your Node Materiel

Thx

@leo3d see attached image. basically i did what @romullus said.