Why do black circles appear?


Pay attention to the black circle at the end, as the probability of using VolumetricLightScatteringPostProcess is high

I’m afraid we won’t be able to help if we don’t have some kind of reproduction in the playground…

Electric spark, welding | Babylon.js Playground (babylonjs.com)
Could you please help me take a look by the way? There is a probability that the screen will reload, which is when it suddenly becomes transparent, flickers, and then reloads

I think it’s a problem with Interval logic.
https://playground.babylonjs.com/#QHQ1S3#3

The intersection of stop interval and stop2 interval doesn’t feel smooth.

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The light.intensity value can become negative because of the low starting values like 0 and 5. You should check it is positive before decrementing the value:

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Thank you very much. When the light intensity is negative, the color of the light source is black