Messages

16

[Max] I need help! / Re: Physically correct materials

« on: 2016-07-25, 11:57:15 »

Wow thanks guys.

And do you know anything about the main topic? Can anyone aid me in creating physically correct shaders in Corona? :)

17

[Max] I need help! / Re: Physically correct materials

« on: 2016-07-24, 17:20:51 »

Thanks! That clears things out a bit.
I am also TRYING to use GGX in VRay now but since a haven't seen any never Grant's lessons (yet) i'm running blind on how to use it properly.
Can you support me with any kind of VRay tutorials of how to create PBR shaders in VRay 3? I had no luck in finding something usefull :(

So yea... in your opinion i'm now trying to learn legacy method of doing things. Great :-/
So the question is: if the Corona has GGX but fresnel is wrong, how to correct this since you said that no one is using this method anymore?

My current method is:
1. I choose a reflective curve of a material I want to create.
2. I represent this curve in fallof map that is put in the reflective (fresnel is off).
3. I'm trying to eyeball correct setting for GGX (GTR tail fallof) but im not sure what i'm doing there, what to type in there.
I do not blend materials with different gloss. already since i heard that GGX can do this for me. But i'm still trying to re-create the propper fresnel. Is that method ok?

I would be super thankfull for any kind of practical help. Cuz in theory i think i do understand what I read in the 1st link (and other materials linked to it) but I still have a cloudy idea how to create a propper material.
 

18

[Max] I need help! / Physically correct materials

« on: 2016-07-23, 16:34:12 »

Hi guys!

I'd like to start a discussion about physically correct materials creation in Corona Renderer.
Lately I was enjoying the Grant Warwick's method of creating such in VRay. You know, the way where he disable VRay's Fresnel option and create one by himself using fallof map. Then he Blend few materials with different fallof map to create the GGX shader effect.

I was wondering is there a way to use this worflow in Corona renderer? Cuz I don't think it's possible to disable Fresnel in corona materials, am I right? I don't see any option to create my own reflective curve in Corona material. Blending materials in corona using AO or fallof as masks give great results, but what if I have charts that tells me how the correct reflective curve should look like and I would like to put it into the Corona? Or maybe there is another option that can help me createing realistic materials without eyeballing it?

What do you guys think?

19

[Max] I need help! / Re: Why my light is so noisy?

« on: 2015-12-08, 13:23:38 »

Thank you a lot guys! Both your solutions were correct! BUMP could be smaller, the light was WAY to intensive.
 Now the render is clean as a baby's a.... feet!

Thank you again!

20

[Max] I need help! / Why my light is so noisy?

« on: 2015-12-08, 09:31:37 »

Hallo everyone!
Sometimes I encounter problems with light in Corona. There is just no way to render it without noise. I've attachted an example scene. Please look at candles reflections on the floor and also the window light/reflection on the right side of the table, on the floor. This render took 9h with 48 cores.

I light this scene only with HDRI map and lights from the candles.
There are portals in the windows placed - as I assume - correctly.
I've also tried some different settings, and attachted the latest one.

Do anyone know what am I doing wrong? I would be greatfull for any kind of help.

Cheers!

21

[Max] I need help! / Re: How to remove burned edges???

« on: 2015-07-15, 15:07:03 »

Thank you for the reply. I totally forgot about the override!

I think that will do the trick. And please note, that I already wrote, that MATTE options did not work in this case :(

Can you advice me what tool for compositing is better? After Effect maybe?

22

[Max] I need help! / How to remove burned edges???

« on: 2015-07-15, 14:22:18 »

Hallo!
I'm new in Corona (working in 3ds MAX) so I still act a little in the dark. I've encountered a problem that can be seen in the attached picture (mostly in the right window and balcony fence)
Picture was rendered to PNG format, without the background so I could plant a picture in the back. Since using CORONA SKY in the  ENVIORMENT slot, background while rendering was white. This causes these white edges.
My question is how to get rid of them !?
Maybe there is a way for the background to be black while rendering or maybe editing in photoshop can somehow overcome them? MATTE option in PS does not work, also the HIGLIHHT COMPRESS does not work in this case.

I would be greatfull for the help!

Cheers