Possible bug when using "Render Selected"

Hi,

The following set-up is buggy (however, I’m doing this in a very complicated scene that’s had it’s fair share of errors - so it is possible that this is scene related)

  • Render selected mode set to “include/exclude list”. I have 2 (very large) objects selected.
  • One of these selected objects above has “cast shadows” disabled.
  • I’m using Corona Sun+Sky for environment lighting
  • But using 'direct visibility override" set to a HDRI bitmap (connected through a colour-correction then CoronaSelectMtl.)

With this set-up the background renders black. This is the bug.

As soon as I disable the ‘render selected’ the background bitmap reappears.

I know this is kind of niche, but hopefully this can be replicated.

Max 2021 / Corona 8 daily build Jul 28.

Good luck and thanks!

Hi aaouviz,

I believe that that was always the case with render selected modes, it would always purposely replace any background with a black background, except if the “Clear VFB between render” option is disabled. In which case it will show the last rendered background and only re-rendering the selection in a form of a cutout region.

Hi,

Yes, I was thinking about this report more once I posted it.

You’re 100% right. This makes sense when I want to do a render ‘inclusion’ (ie; render only certain objects). Of course I don’t want the background to render.

However, one thing I forgot to clarify was that the ‘include/exclude’ list is set to ‘exclude’… so I don’t want to exclude the background, but it is excluded anyway…

In my eyes, this is a mistake… I understand why the background is excluded, but it doesn’t make much sense… I only want to exclude the objects (thus the background should be excluded only where the objects occlude it)

Does this make sense?