diff --git a/doc/classes/CPUParticles.xml b/doc/classes/CPUParticles.xml
index 0676e40b7..7345eb2f2 100644
--- a/doc/classes/CPUParticles.xml
+++ b/doc/classes/CPUParticles.xml
@@ -266,7 +266,7 @@
 			Emission lifetime randomness ratio.
 		</member>
 		<member name="scale_amount" type="float" setter="set_param" getter="get_param" default="1.0">
-			Initial scale applied to each particle.
+			Initial scale applied to each particle. This can be set to a negative value to flip the particle on all axes.
 		</member>
 		<member name="scale_amount_curve" type="Curve" setter="set_param_curve" getter="get_param_curve">
 			Each particle's scale will vary along this [Curve].
diff --git a/doc/classes/CPUParticles2D.xml b/doc/classes/CPUParticles2D.xml
index 8292fe725..f7b79ea03 100644
--- a/doc/classes/CPUParticles2D.xml
+++ b/doc/classes/CPUParticles2D.xml
@@ -245,7 +245,7 @@
 			Emission lifetime randomness ratio.
 		</member>
 		<member name="scale_amount" type="float" setter="set_param" getter="get_param" default="1.0">
-			Initial scale applied to each particle.
+			Initial scale applied to each particle. This can be set to a negative value to flip the particle on all axes.
 		</member>
 		<member name="scale_amount_curve" type="Curve" setter="set_param_curve" getter="get_param_curve">
 			Each particle's scale will vary along this [Curve].
diff --git a/scene/2d/cpu_particles_2d.cpp b/scene/2d/cpu_particles_2d.cpp
index b0fd2f96d..923ea3304 100644
--- a/scene/2d/cpu_particles_2d.cpp
+++ b/scene/2d/cpu_particles_2d.cpp
@@ -29,9 +29,9 @@
 /*************************************************************************/
 
 #include "cpu_particles_2d.h"
+#include "core/containers/rid.h"
 #include "core/core_string_names.h"
 #include "core/os/os.h"
-#include "core/containers/rid.h"
 #include "scene/2d/canvas_item.h"
 #include "scene/resources/particles_material.h"
 #include "scene/resources/texture.h"
@@ -926,9 +926,9 @@ void CPUParticles2D::_particles_process(float p_delta) {
 
 		//scale by scale
 		float base_scale = tex_scale * Math::lerp(parameters[PARAM_SCALE], 1.0f, p.scale_rand * randomness[PARAM_SCALE]);
-		if (base_scale < 0.000001) {
-			base_scale = 0.000001;
-		}
+
+		// Prevent zero scale (which can cause rendering issues).
+		base_scale = SGN(base_scale) * MAX(Math::abs(base_scale), 0.000001);
 
 		p.transform.columns[0] *= base_scale;
 		p.transform.columns[1] *= base_scale;
@@ -1266,7 +1266,7 @@ void CPUParticles2D::_bind_methods() {
 	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "angle_random", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_param_randomness", "get_param_randomness", PARAM_ANGLE);
 	ADD_PROPERTYI(PropertyInfo(Variant::OBJECT, "angle_curve", PROPERTY_HINT_RESOURCE_TYPE, "Curve"), "set_param_curve", "get_param_curve", PARAM_ANGLE);
 	ADD_GROUP("Scale", "");
-	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "scale_amount", PROPERTY_HINT_RANGE, "0,1000,0.01,or_greater"), "set_param", "get_param", PARAM_SCALE);
+	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "scale_amount", PROPERTY_HINT_RANGE, "-1000,1000,0.01,or_greater"), "set_param", "get_param", PARAM_SCALE);
 	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "scale_amount_random", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_param_randomness", "get_param_randomness", PARAM_SCALE);
 	ADD_PROPERTYI(PropertyInfo(Variant::OBJECT, "scale_amount_curve", PROPERTY_HINT_RESOURCE_TYPE, "Curve"), "set_param_curve", "get_param_curve", PARAM_SCALE);
 	ADD_GROUP("Color", "");
diff --git a/scene/3d/cpu_particles.cpp b/scene/3d/cpu_particles.cpp
index 218f89c94..5df981b06 100644
--- a/scene/3d/cpu_particles.cpp
+++ b/scene/3d/cpu_particles.cpp
@@ -997,9 +997,9 @@ void CPUParticles::_particles_process(float p_delta) {
 
 		//scale by scale
 		float base_scale = tex_scale * Math::lerp(parameters[PARAM_SCALE], 1.0f, p.scale_rand * randomness[PARAM_SCALE]);
-		if (base_scale < 0.000001) {
-			base_scale = 0.000001;
-		}
+
+		// Prevent zero scale (which can cause rendering issues).
+		base_scale = SGN(base_scale) * MAX(Math::abs(base_scale), 0.000001);
 
 		p.transform.basis.scale(Vector3(1, 1, 1) * base_scale);
 
@@ -1482,7 +1482,7 @@ void CPUParticles::_bind_methods() {
 	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "angle_random", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_param_randomness", "get_param_randomness", PARAM_ANGLE);
 	ADD_PROPERTYI(PropertyInfo(Variant::OBJECT, "angle_curve", PROPERTY_HINT_RESOURCE_TYPE, "Curve"), "set_param_curve", "get_param_curve", PARAM_ANGLE);
 	ADD_GROUP("Scale", "");
-	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "scale_amount", PROPERTY_HINT_RANGE, "0,1000,0.01,or_greater"), "set_param", "get_param", PARAM_SCALE);
+	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "scale_amount", PROPERTY_HINT_RANGE, "-1000,1000,0.01,or_greater"), "set_param", "get_param", PARAM_SCALE);
 	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "scale_amount_random", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_param_randomness", "get_param_randomness", PARAM_SCALE);
 	ADD_PROPERTYI(PropertyInfo(Variant::OBJECT, "scale_amount_curve", PROPERTY_HINT_RESOURCE_TYPE, "Curve"), "set_param_curve", "get_param_curve", PARAM_SCALE);
 	ADD_GROUP("Color", "");