From af2fea0ad3ce61ba52fc8201f6434587cb1e97f3 Mon Sep 17 00:00:00 2001
From: Skyth <19259897+blueskythlikesclouds@users.noreply.github.com>
Date: Tue, 5 May 2026 19:02:28 +0300
Subject: [PATCH] Fix leftover particle data when updating particle buffers.

Co-authored-by:  Skyth <19259897+blueskythlikesclouds@users.noreply.github.com>
---
 drivers/gles3/storage/particles_storage.cpp                    | 1 +
 servers/rendering/renderer_rd/storage_rd/particles_storage.cpp | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/gles3/storage/particles_storage.cpp b/drivers/gles3/storage/particles_storage.cpp
index cb8c77dd2c5..48f5d4ead2e 100644
--- a/drivers/gles3/storage/particles_storage.cpp
+++ b/drivers/gles3/storage/particles_storage.cpp
@@ -868,6 +868,7 @@ void ParticlesStorage::_particles_update_buffers(Particles *particles) {
 	if (userdata_count != particles->userdata_count) {
 		// Mismatch userdata, re-create buffers.
 		_particles_free_data(particles);
+		particles->restart_request = true;
 	}
 
 	if (particles->amount > 0 && particles->front_process_buffer == 0) {
diff --git a/servers/rendering/renderer_rd/storage_rd/particles_storage.cpp b/servers/rendering/renderer_rd/storage_rd/particles_storage.cpp
index 764f7aad9f0..a4dc0515042 100644
--- a/servers/rendering/renderer_rd/storage_rd/particles_storage.cpp
+++ b/servers/rendering/renderer_rd/storage_rd/particles_storage.cpp
@@ -1394,6 +1394,7 @@ void ParticlesStorage::_particles_update_buffers(Particles *particles) {
 		if (particles->particle_buffer.is_null()) {
 			particles->particle_buffer = RD::get_singleton()->storage_buffer_create((sizeof(ParticleData) + userdata_count * sizeof(float) * 4) * total_amount);
 			particles->userdata_count = userdata_count;
+			particles->restart_request = true;
 		}
 
 		PackedByteArray data;