Hi there,
why is it sometimes, that SPS or Meshes with NodeMaterials are disappearing on certain cam positions?
Here’s an example where I just have a smaller radius on the ArcRotateCamera
The NodeMaterial has nothing special - just fading colors. The SPS is a normal one, there is nothing else in this scene (ignore the pulsating meshes 
)
Maybe the solution is here Troubleshooting Solid Particle System Visibility Issues | Babylon.js Documentation
Will have a look, thanks a lot @jerome <3
sps.isAlwaysVisible = true
This is the solution. Thank you @jerome
For future searches - the reason is because the bounding box of my sps is at 0,0,0 and after the camera moves away, the bbox is not visible anymore - so the sps particles disappear.