# GPU Particles spriteRandomStartCell not working

**URL:** <https://forum.babylonjs.com/t/gpu-particles-spriterandomstartcell-not-working/6973>\
**Category:** Bugs\
**Created:** [November 13, 2019, 8:43pm UTC](https://forum.babylonjs.com/t/gpu-particles-spriterandomstartcell-not-working/6973 "2019-11-13T20:43:51Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![thrice](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/thrice/32/105_2.png) [@thrice](https://forum.babylonjs.com/u/thrice)\
**Post date:** [November 13, 2019, 8:43pm UTC](https://forum.babylonjs.com/t/gpu-particles-spriterandomstartcell-not-working/6973/1 "2019-11-13T20:43:51Z")

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[https://www.babylonjs-playground.com/#CLN02N#14](https://www.babylonjs-playground.com/#CLN02N#14)

Works for normal system not GPU

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**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\
**Post date:** [November 13, 2019, 8:54pm UTC](https://forum.babylonjs.com/t/gpu-particles-spriterandomstartcell-not-working/6973/2 "2019-11-13T20:54:37Z")

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Can you share the working version with CPU particles?

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<div class="post-metadata">

**Author:** ![thrice](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/thrice/32/105_2.png) [@thrice](https://forum.babylonjs.com/u/thrice)\
**Post date:** [November 13, 2019, 9:02pm UTC](https://forum.babylonjs.com/t/gpu-particles-spriterandomstartcell-not-working/6973/3 "2019-11-13T21:02:06Z")

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Yeppers, [https://www.babylonjs-playground.com/#CLN02N#16](https://www.babylonjs-playground.com/#CLN02N#16)

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**Author:** ![Evgeni\_Popov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/evgeni_popov/32/4432_2.png) [@Evgeni\_Popov](https://forum.babylonjs.com/u/Evgeni_Popov)\
**Post date:** [November 13, 2019, 9:12pm UTC](https://forum.babylonjs.com/t/gpu-particles-spriterandomstartcell-not-working/6973/4 "2019-11-13T21:12:58Z")

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Both PG work for me.

GPU particle system needs WebGL2: check if you get a ‘true’ here:

[https://www.babylonjs-playground.com/#CLN02N#17](https://www.babylonjs-playground.com/#CLN02N#17)

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<div class="post-metadata">

**Author:** ![thrice](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/thrice/32/105_2.png) [@thrice](https://forum.babylonjs.com/u/thrice)\
**Post date:** [November 13, 2019, 9:17pm UTC](https://forum.babylonjs.com/t/gpu-particles-spriterandomstartcell-not-working/6973/5 "2019-11-13T21:17:47Z")

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Yes I don’t think the PS would be rendering without it. So you see something other than this?  
[Dropbox - Screenshot 2019-11-13 14.15.45.png - Simplify your life](https://www.dropbox.com/s/p0c64y8xf2kmunz/Screenshot%202019-11-13%2014.15.45.png?dl=0)

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<div class="post-metadata">

**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\
**Post date:** [November 13, 2019, 9:22pm UTC](https://forum.babylonjs.com/t/gpu-particles-spriterandomstartcell-not-working/6973/6 "2019-11-13T21:22:52Z")

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I see that GPU particles are not picking a random cell which is weird.  
Let me investigate

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<div class="post-metadata">

**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\
**Post date:** [November 13, 2019, 9:43pm UTC](https://forum.babylonjs.com/t/gpu-particles-spriterandomstartcell-not-working/6973/7 "2019-11-13T21:43:35Z")

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ok fixed…will be in next nightly!

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<div class="post-metadata">

**Author:** ![thrice](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/thrice/32/105_2.png) [@thrice](https://forum.babylonjs.com/u/thrice)\
**Post date:** [November 13, 2019, 9:46pm UTC](https://forum.babylonjs.com/t/gpu-particles-spriterandomstartcell-not-working/6973/8 "2019-11-13T21:46:12Z")

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Thank you @Deltakosh !

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<div class="post-metadata">

**Author:** ![Evgeni\_Popov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/evgeni_popov/32/4432_2.png) [@Evgeni\_Popov](https://forum.babylonjs.com/u/Evgeni_Popov)\
**Post date:** [November 13, 2019, 10:25pm UTC](https://forum.babylonjs.com/t/gpu-particles-spriterandomstartcell-not-working/6973/9 "2019-11-13T22:25:55Z")

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My bad, I didn’t see the sprites were different in the CPU case!!

So it does not work for me either.