fix particles scale randomization

scene/2d/cpu_particles_2d.cpp

@@ -866,8 +866,8 @@ void CPUParticles2D::_particles_process(float p_delta) {
 		}
 
 		//scale by scale
-		float base_scale = Math::lerp(parameters[PARAM_SCALE] * tex_scale, 1.0f, p.scale_rand * randomness[PARAM_SCALE]);
-		if (base_scale == 0.0) base_scale = 0.000001;
+		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;
 
 		p.transform.elements[0] *= base_scale;
 		p.transform.elements[1] *= base_scale;

scene/3d/cpu_particles.cpp

@@ -915,8 +915,8 @@ void CPUParticles::_particles_process(float p_delta) {
 		}
 
 		//scale by scale
-		float base_scale = Math::lerp(parameters[PARAM_SCALE] * tex_scale, 1.0f, p.scale_rand * randomness[PARAM_SCALE]);
-		if (base_scale == 0.0) base_scale = 0.000001;
+		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;
 
 		p.transform.basis.scale(Vector3(1, 1, 1) * base_scale);
 

scene/resources/particles_material.cpp

@@ -567,8 +567,8 @@ void ParticlesMaterial::_update_shader() {
 		}
 	}
 	//scale by scale
-	code += "	float base_scale = mix(scale * tex_scale, 1.0, scale_random * scale_rand);\n";
-	code += "	if (base_scale == 0.0) {\n";
+	code += "	float base_scale = tex_scale * mix(scale, 1.0, scale_random * scale_rand);\n";
+	code += "	if (base_scale < 0.000001) {\n";
 	code += "		base_scale = 0.000001;\n";
 	code += "	}\n";
 	if (trail_size_modifier.is_valid()) {