mirror not rendering alpha cutout correctly (3.4)

[andybot]

What happened??

3.3 is correct, and 3.4 is incorrect. (Also - why don’t the clouds in the sky stay the same from one version to the other?)

mirror-test.skp.zip (728 KB)

[Clemens_Musterle]

Hey @andybot , thanks for the report! We’ve reproduced the behavior and will fix this for the next update. Fortunately, right now this affects only generic materials and not foliage materials, which are most often used with cut-out textures. So setting the material to foliage should fix at least this particular case.

[andybot]

I noticed it when rendering an interior with a treeline backdrop in the reflections. I use a small amount of self-emmissivity to keep the treeline from rendering too dark, so the foliage setting doesn’t help in this case. Good to know this will be fixed though, appreciate you looking into this.

[Clemens_Musterle]

@andybot this issue should now be fixed with today’s 3.4.1 Preview release

[andybot]

I just tested it out… um, you all seem to have over-corrected. Now the image isn’t showing up at all in the reflection. (Please test against the file I uploaded earlier.)

[Clemens_Musterle]

As odd as it may sound, please test it in your regular scene with more geometry. Then everything should look as expected.

We actually came across the same issue when validating with your scene, but are tracking this as a separate bug with a lower priority, as it should only ever happen in such extremely simple scenes.

[andybot]

Curious! Thanks for the addition information, it does seem to be working as expected in normal scenes.