Five Common Reasons GPUParticles2D Fails to Show in Godot 4

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Developers using Godot 4's GPUParticles2D node often encounter invisible particles due to several silent configuration errors that produce no warnings or crashes. The most frequent cause is a missing ParticleProcessMaterial, without which the node emits nothing by default. Other common issues include the emitting property being set to false after scene duplication, frustum culling removing particles that fall outside the default visibility rectangle, and insufficient amount or lifetime values causing particles to vanish almost instantly. Additionally, one-shot emitters configured to fire at scene load will not repeat unless explicitly restarted in code using the restart() method.

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