# Is this a render bug?

**URL:** <https://forum.babylonjs.com/t/is-this-a-render-bug/58951>\
**Category:** Questions\
**Created:** [June 12, 2025, 11:21am UTC](https://forum.babylonjs.com/t/is-this-a-render-bug/58951 "2025-06-12T11:21:21Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![Joe\_Kerr](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/joe_kerr/32/39017_2.png) [@Joe\_Kerr](https://forum.babylonjs.com/u/Joe_Kerr)\
**Post date:** [June 12, 2025, 8:44pm UTC](https://forum.babylonjs.com/t/is-this-a-render-bug/58951/8 "2025-06-12T20:44:10Z")

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I was going to file this as something wrong with my laptop. But this is awfully specific. To reproduce the blue issue:

1. Open firefox
2. Go to playground from above
3. Notice it is not blue
4. Tab away
5. Close firefox (keep tab open; but not active)
6. Open firefox again
7. Open playground
8. The blue issue occurs

But to fix it, it seems, you just have to run the playground again.

> [@CrashMaster](#):
>
> Does it happen for small buffer sizes as well?

Ah, good catch! I have just tried with 64x64 texture ([https://playground.babylonjs.com/#53XBC3#1](https://playground.babylonjs.com/#53XBC3#1)) and I cannot reproduce anymore. But the moment I switch back to the 512x512, blue again.

* * *

> [@Pryme8](#):
>
> what you are trying to accomplish

Just a minimal reproduction of what I thought was (or is, idk) a bug.

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