ParticlesVisibilityAabb Property

The AABB that determines the node's region which needs to be visible on screen for the particle system to be active.

Grow the box if particles suddenly appear/disappear when the node enters/exits the screen. The AABB can be grown via code or with the Particles → Generate AABB editor tool.

Note: If the ParticlesMaterial in use is configured to cast shadows, you may want to enlarge this AABB to ensure the shadow is updated when particles are off-screen.