Author Topic: My test of Corona render  (Read 9920 times)

2014-01-11, 14:11:59

Dolphinoff

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Girls room test with pt+hd and vcm (no post)
Sorry for my english


2014-01-11, 18:23:31
Reply #2

Ondra

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hehe, really nice example of what path tracing cannot do ;)
Rendering is magic.
Private scene uploader | How to get minidumps for crashed/frozen 3ds Max | Sorry for short replies, brief responses = more time to develop Corona ;)

2014-01-11, 19:21:44
Reply #3

Elviz

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This is sick, I'm done.
Elviz - 3D Visual Arts
www.elviz.co.il
elirender@gmail.com

2014-01-11, 20:10:47
Reply #4

gracelorn

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The lighting in the VCM one looks so real. I wonder though, how is it so clean after 1600+ passes? When I switch to VCM I can't get rid of fireflies even after 15000 passes.


2014-01-11, 20:35:45
Reply #5

Dolphinoff

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Thank you very much guys, I'm very pleased. This is not the best example of interior design. I love to play with caustic in different renderers. The secret of a clean picture after 1600 passes, is a rectangle light neer to the camera, he is simulating flashlight and of course the importance sampling (more simply a directional light) :)
Sorry for my english

2014-01-12, 10:55:18
Reply #6

romullus

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Wonderful results. Could you show your render settings? I tried to do something similar, but all i get is ton of fireflies, even after 5K passes.
I'm not Corona Team member. Everything i say, is my personal opinion only.

2014-01-12, 11:10:22
Reply #7

maru

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Are you using hybrid glass mode?
Is your reflectivity always lower than 1?
Are you using some very strong lights in this scene?

2014-01-12, 11:15:37
Reply #8

Ludvik Koutny

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Are you using hybrid glass mode?
Is your reflectivity always lower than 1?
Are you using some very strong lights in this scene?

If you read the thread you would notice that they are experimenting with VCM. I doubt VCM supports fakes, including hybrid glass ;)

2014-01-12, 11:16:10
Reply #9

Ludvik Koutny

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Are you using hybrid glass mode?
Is your reflectivity always lower than 1?
Are you using some very strong lights in this scene?

If you read the thread you would notice that they are experimenting with VCM. I doubt VCM supports fakes, including hybrid glass ;) And yes, they use strong lights, to emulate camera flashlight... that is the point ;)

2014-01-12, 11:50:33
Reply #10

romullus

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Yes, unfortunally, light is small and very strong. I even used a little directionality on that light. I'm not sure if it can cause any problems. Glass is solid on all objects, as far as i recall.
Btw, does changing such parameters as PTS, MSI or LSM, have any influence on image quality in VCM mode? I did some test region renders while changing those and didn't notice any significant changes.

I'm not Corona Team member. Everything i say, is my personal opinion only.

2014-01-12, 12:20:31
Reply #11

gracelorn

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Is there a chance that VCM will be optimised to the point where one can use it for practical applications? Because, serioulsy, it looks amazing!

2014-01-12, 12:29:50
Reply #12

Ondra

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Btw, does changing such parameters as PTS, MSI or LSM, have any influence on image quality in VCM mode? I did some test region renders while changing those and didn't notice any significant changes.
No, they are ignored
Rendering is magic.
Private scene uploader | How to get minidumps for crashed/frozen 3ds Max | Sorry for short replies, brief responses = more time to develop Corona ;)

2014-01-12, 20:07:56
Reply #13

Dolphinoff

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Settings:
Sorry for my english

2014-01-13, 01:05:09
Reply #14

romullus

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Keymaster and Dolphinoff, thanks for answers. Unfortunately, changing random sampler didn't helped a bit.
I tried to hide all objects with glass and metal materials on them and all fireflies has gone. Then i unhide big flat mirror - no fireflies, but as soon as i started to unhide small curvy objects with high specularity materials, those nasty creatures started to crawl back :[ My typical chrome material has  0 diffuse, 0.5-0.6 reflectivity, 0.96-0.98 glossiness, 18-25 IOR and glass - 0 diffuse, 0.8 reflectivity, 1.54 IOR and solid shadows. Not sure if i could change these settings much without altering believability too much.
Somehow i think that biggest secret of fireflies free picture from Dolphinoff, is lack objects with complex shape and high glossiness in his scene.
I'm not Corona Team member. Everything i say, is my personal opinion only.

2014-01-13, 01:44:38
Reply #15

astudio

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No, he has a lot of glossy here, may be reflections not so strong, but anyway. In 1600 paths in my scene I still have a lot of noise and a lot of firefiles with VCM. :(

2014-01-13, 12:24:02
Reply #16

Dolphinoff

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Romullus, are you using emitter by material, or corona light?
May be try a sphere light or rectangle with bigger radius?
System units in cm\mm?

I have firefly too, on the red glass. But i have material with 255 white reflection and 1.0 power on it and on chrome material inside them. it is my mistake.

There is some tests with same config, with 1h render and render with only flashlight on

In last picture i turn off DOF
Sorry for my english

2014-01-13, 15:40:42
Reply #17

romullus

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Fixture on ceiling in my scene has material with light emission on it, but it's very weak. Light source that simulates flashlight near camera, is corona light. It's small (20mmx5mm) and extremely powerful - 20K units of intensity. I tried to change its shape to sphere, but fireflies grew up in orders of magnitude :]
My system units is in mm.

I decided to make very simple scene to experiment more with caustics and after many tries and errors, i found one way to completely get rid of these nasty bugs. I found that setting glossiness value to 1, in reflection and refraction, gives fireflies free image. Now i'm trying to fix all materials in my main scene. Will see if it works in more complex scene.
I'm not Corona Team member. Everything i say, is my personal opinion only.

2014-01-13, 20:55:50
Reply #18

romullus

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And what do you know - it worked like a charm! :] http://corona-renderer.com/forum/index.php/topic,2466.0.html
Thanks for the help, everyone.
I'm not Corona Team member. Everything i say, is my personal opinion only.

2014-01-14, 18:27:39
Reply #19

The Pixel Artist

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Dolphinoff, wow, that's an incredible image!  The work you did on that ceiling and wall light and the lighting results is just excellentl!  ( I'm also very jealous! ;^D )

Anyhow, this is definitely a "bar raising" image!  I'm definitely going to have to do some experimenting with VCM!
Adrian Alan Brown
The Pixel Artist Illustration
www.thepixelartist.com
Behance Gallery: https://www.behance.net/thepixelartist

2014-01-15, 05:51:35
Reply #20

Dolphinoff

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The Pixel Artist, to be honest, I never thought that someone like my tests :) Thank you very much and good luck with your experiments!
Sorry for my english