Strange things happening in Render Elements.

Corona Corona for 3ds Max Issues
1

I have noticed some strange behavior with render elements and corona in Max. I have renders that contain no refraction, yet I am getting things showing up in the refraction pass that should just be black.

Not sure when I started noticing this. But I have been getting things showing up in Render Elements that should not be there.

Notes:

  • No refraction in any materials.
  • Refraction pass has strange things in the pass. Like blurry splotches, and other things that show up.
  • It does not always show the same strange things in the render.
2

Is this Intel AI denoiser + Corona pre v5 daily build 27-08-2019? If so, try without and see if something changes.

Good Luck

3

It is using the Intel AI denoiser, and is using Corona 4 Hotfix 1. I will see if it happens without it. Is there something somewhere that says there is a problem with this.

4

Unfortunately no - there is no public bug tracker anymore. It should be fixed since Corona v5 daily build 27-08-2019, see

Fixed the denoiser adding ghosts of objects which are not visible in the scene due to lack of lighting

https://forum.corona-renderer.com/ Corona Renderer 5 for 3ds Max - Daily Builds Changelog #msg154963

Good Luck

5

Thank you. I appreciate you taking the time to point me in the right direction.

6

So disabling the denoiser/updating to the latest Corona version fixed this for you?

7

I have not tried that yet, as I am in a production. I will try the de-noise change on my next render.