Interactive Light Mix Discrepancy - UHD Cache

Corona Corona for 3ds Max Issues
1

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

or14mMY.jpg
or14mMY.jpg1920×1080 531 KB

interactive light mix - path tracing

0KbrSDO.jpg
0KbrSDO.jpg1920×1080 529 KB

beauty - UHD cache

Ix6an4J.jpg
Ix6an4J.jpg1920×1080 512 KB

interactive light mix - UHD cache

4LFnvbt.jpg
4LFnvbt.jpg1920×1080 507 KB

2

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)

3

Ticket has been created - link to scene file included:

#186321 Interactive Light Mix Discrepancy - UHD Cache

4

Confirmed, logged.

(Internal ID=522756254)