Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: nicolas7755 on 2018-02-06, 13:54:26

Title: Interactive Render shows different result than Final Render
Post by: nicolas7755 on 2018-02-06, 13:54:26

Hi everybody

I'm currently working on a bathroom scene.
It's lighted with an HDRI and a couple of rectangular CoronaLights, most of them are invisible, with zero visibility in reflections, refractions and don't occlude other lights.
While I'm still in the interactive rendering, this works like a charm. But as soon as I render the final image, weird black artifacts start to appear. Turning off the artificial lights makes the artifacts go away.

Any idea on how to get rid of this?
Thanks in advance for your help

Best,
Nicolas

Title: Re: Interactive Render shows different result than Final Render
Post by: TomG on 2018-02-06, 14:06:49

First thoughts - is this 3ds Max or C4D? Also, is IR set to force Path Tracing, and the final using UHD Cache?

Title: Re: Interactive Render shows different result than Final Render
Post by: nicolas7755 on 2018-02-06, 14:13:12

Hi there

Thanks for your reply and sorry for the incomplete information.
I'm working on 3ds Max 2017 with Corona 1.7.

The final is indeed using path tracing as primary solver and uhd cache as secondary, but force path tracing in IR is turned off.

Title: Re: Interactive Render shows different result than Final Render
Post by: Ondra on 2018-02-06, 14:23:51

Looks like NaNs - can you share the scene with us? Can you also right-click the black places and tell us if there is number listed as pixel color, or NAN?

Title: Re: Interactive Render shows different result than Final Render
Post by: nicolas7755 on 2018-02-06, 16:00:15

Hi Ondra

If I right-click, there are numbers as pixel colors listed. So it's probably no NaNs.
I'll try to upload the scene tonight!

Title: Re: Interactive Render shows different result than Final Render
Post by: maru on 2018-02-08, 13:43:00

Are you using the "new light solver" here? (checkbox in performance tab)

Title: Re: Interactive Render shows different result than Final Render
Post by: nicolas7755 on 2018-02-09, 10:25:41

Hi maru

No, I don't use the new light solver.

I figured out now, where the problem came from:
For some reason, I had a refraction override active, which caused the artifacts.

Title: Re: Interactive Render shows different result than Final Render
Post by: maru on 2018-02-09, 11:08:42

Hmm... that's strange the use of new light solver should be one possible difference between IR and regular render.
Another one might be the enviro solver?

Could you send us this scene anyway? (or a part of it, with the problem present)