Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => Topic started by: cjwidd on 2020-06-13, 01:13:15

Title: Interactive Light Mix Discrepancy - UHD Cache
Post by: cjwidd on 2020-06-13, 01:13:15

Interactive Light Mix produces a discrepancy from the Beauty pass when UHD Cache is enabled as secondary solver (Corona version: 6 - DailyBuild Jun  3 2020).

No apparent discrepancy if path tracing is enabled as secondary solver

beauty - path tracing
(https://i.imgur.com/or14mMY.png)

interactive light mix - path tracing
(https://i.imgur.com/0KbrSDO.png)

beauty - UHD cache
(https://i.imgur.com/Ix6an4J.png)

interactive light mix - UHD cache
(https://i.imgur.com/4LFnvbt.png)

Title: Re: Interactive Light Mix Discrepancy - UHD Cache
Post by: maru on 2020-06-15, 17:27:52

This has recently been reported by another user. Is there a chance for your scene, so that we could reproduce it better?
In case of the user user the workaround was to either:
- Disable UHD Cache (switch to PT only, which would obviously increase render times)
or
- Remove translucency from a material, which was occluding a light source

The solution may be switching to the new 4K Cache. The build featuring it should be released soon. In our tests, the 4K Cache did not trigger this issue.

(Internal ID=518735615)

Title: Re: Interactive Light Mix Discrepancy - UHD Cache
Post by: cjwidd on 2020-06-15, 22:41:48

Ticket has been created - link to scene file included:

#186321 Interactive Light Mix Discrepancy - UHD Cache

Title: Re: Interactive Light Mix Discrepancy - UHD Cache
Post by: maru on 2020-06-17, 15:46:17

Confirmed, logged.

(Internal ID=522756254)