Rendering issue when changing visibility of an alpha tested plane

Questions
1

Hi All,

I recently bumped the nwjs version of a project of mine as a test(0.29 > 0.59) and noticed there was some weird behavior in Babylon after the update:

In this example animation there are two alpha tested planes with a pixel art texture that have their visibility animated over time.
When animating from visibility 0 to 1 and when the plane becomes fully visible again the transparent pixels of the mesh flash black for what seems to be a frame. Oddly this only seems to occur once per plane.

I’m not sure if there’s something I never configured properly that was hidden by the older nwjs version or if there is something deeper going on.
I can always bump the version back down, but it would be nice to be able to properly use the latest version.

Any input would be appreciated.

2

this probably happens with async shader compilation during shader transition I would suspect ?

Could you repro in the playground it would be really helpful to try out.

3

I was able to get it to reproduce: Babylon.js Playground

Interestingly the flash does not happen in Firefox, but does in Chrome and Edge.

4

yup, as a workaround you can disable parallel shader compilation like this: https://playground.babylonjs.com/#Q51DNW#1

5

That works!
Thank you very much!