Tested versions

v4.5.1.stable.official [f62fdbd]

System information

Godot v4.5.1.stable - Windows 10 (build 19045) - Multi-window, 2 monitors - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 6GB (NVIDIA; 32.0.15.8129) - AMD Ryzen 5 1600 Six-Core Processor (12 threads) - 31.95 GiB memory

Issue description

When calling request_particles_process on a GPUParticles2D node, the sub_emitter will not be processed together with it, creating a gap during the requested process time. Calling request_particles_process on the sub_emitter has no effect.

Steps to reproduce

1. Create a GPUParticle2D node with a sub_emitter
2. Call request_particles_process(1.0) and note the missing sub_emitter trail

Or simply launch the MRP

Minimal reproduction project (MRP)

sub-emitter-process.zip