5 files changed, 7 insertions, 11 deletions
diff --git a/scene/2d/gpu_particles_2d.cpp b/scene/2d/gpu_particles_2d.cpp
index e18f2bd1a1..c8f5d7f5a6 100644
--- a/scene/2d/gpu_particles_2d.cpp
+++ b/scene/2d/gpu_particles_2d.cpp
@@ -299,10 +299,6 @@ bool GPUParticles2D::get_interpolate() const {
 PackedStringArray GPUParticles2D::get_configuration_warnings() const {
 	PackedStringArray warnings = Node2D::get_configuration_warnings();
 
-	if (RenderingServer::get_singleton()->is_low_end()) {
-		warnings.push_back(RTR("GPU-based particles are not supported by the OpenGL video driver.\nUse the CPUParticles2D node instead. You can use the \"Convert to CPUParticles2D\" option for this purpose."));
-	}
-
 	if (process_material.is_null()) {
 		warnings.push_back(RTR("A material to process the particles is not assigned, so no behavior is imprinted."));
 	} else {
diff --git a/scene/2d/gpu_particles_2d.h b/scene/2d/gpu_particles_2d.h
index 7fba174357..94555e0bb0 100644
--- a/scene/2d/gpu_particles_2d.h
+++ b/scene/2d/gpu_particles_2d.h
@@ -64,7 +64,7 @@ private:
 #endif
 	Ref<Material> process_material;
 
-	DrawOrder draw_order;
+	DrawOrder draw_order = DRAW_ORDER_LIFETIME;
 
 	Ref<Texture2D> texture;
 
diff --git a/scene/3d/gpu_particles_3d.cpp b/scene/3d/gpu_particles_3d.cpp
index 9d04202c2d..17dfe2610e 100644
--- a/scene/3d/gpu_particles_3d.cpp
+++ b/scene/3d/gpu_particles_3d.cpp
@@ -272,10 +272,6 @@ bool GPUParticles3D::get_interpolate() const {
 PackedStringArray GPUParticles3D::get_configuration_warnings() const {
 	PackedStringArray warnings = GeometryInstance3D::get_configuration_warnings();
 
-	if (RenderingServer::get_singleton()->is_low_end()) {
-		warnings.push_back(RTR("GPU-based particles are not supported by the OpenGL video driver.\nUse the CPUParticles3D node instead. You can use the \"Convert to CPUParticles3D\" option for this purpose."));
-	}
-
 	bool meshes_found = false;
 	bool anim_material_found = false;
 
diff --git a/scene/3d/gpu_particles_3d.h b/scene/3d/gpu_particles_3d.h
index 835d71862a..d1768436e5 100644
--- a/scene/3d/gpu_particles_3d.h
+++ b/scene/3d/gpu_particles_3d.h
@@ -82,7 +82,7 @@ private:
 
 	Ref<Material> process_material;
 
-	DrawOrder draw_order;
+	DrawOrder draw_order = DRAW_ORDER_INDEX;
 
 	Vector<Ref<Mesh>> draw_passes;
 	Ref<Skin> skin;
diff --git a/scene/main/node.cpp b/scene/main/node.cpp
index 377620af64..5dd0911694 100644
--- a/scene/main/node.cpp
+++ b/scene/main/node.cpp
@@ -2581,10 +2581,14 @@ void Node::print_orphan_nodes() {
 }
 
 void Node::queue_free() {
+	// There are users which instantiate multiple scene trees for their games.
+	// Use the node's own tree to handle its deletion when relevant.
 	if (is_inside_tree()) {
 		get_tree()->queue_delete(this);
 	} else {
-		SceneTree::get_singleton()->queue_delete(this);
+		SceneTree *tree = SceneTree::get_singleton();
+		ERR_FAIL_NULL_MSG(tree, "Can't queue free a node when no SceneTree is available.");
+		tree->queue_delete(this);
 	}
 }