particuls fix

scene/gpu_particles_3d.tscn

@@ -1,6 +1,7 @@
 [gd_scene load_steps=3 format=3 uid="uid://b5rkwb64wgdwf"]
 
 [sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_wf2yo"]
+lifetime_randomness = 0.1
 emission_shape_scale = Vector3(0.1, 0.1, 0.1)
 emission_shape = 1
 emission_sphere_radius = 1.0
@@ -14,7 +15,9 @@ radius = 0.05
 height = 0.1
 
 [node name="GPUParticles3D" type="GPUParticles3D"]
-amount = 50
+emitting = false
+amount = 100
+one_shot = true
 fixed_fps = 60
 process_material = SubResource("ParticleProcessMaterial_wf2yo")
 draw_pass_1 = SubResource("SphereMesh_gj8tf")