diff --git a/resources/shaders/gouraud.fs b/resources/shaders/gouraud.fs
index b2bc915ab..09003f407 100644
--- a/resources/shaders/gouraud.fs
+++ b/resources/shaders/gouraud.fs
@@ -2,30 +2,21 @@
 
 const vec3 ZERO = vec3(0.0, 0.0, 0.0);
 
+varying vec3 clipping_planes_dots;
+
 // x = tainted, y = specular;
 varying vec2 intensity;
 
 varying vec3 delta_box_min;
 varying vec3 delta_box_max;
 
-varying vec3 world_pos;
-
 uniform vec4 uniform_color;
 
-// x = min z, y = max z;
-uniform vec2 z_range;
-
-// clipping plane (general orientation):
-uniform vec4 clipping_plane;
 
 void main()
 {
-    if ((world_pos.z < z_range.x) || (z_range.y < world_pos.z))
+    if (any(lessThan(clipping_planes_dots, ZERO)))
         discard;
-
-    if (world_pos.x*clipping_plane.x + world_pos.y*clipping_plane.y + world_pos.z*clipping_plane.z + clipping_plane.w < 0.0 )
-        discard;
-
     // if the fragment is outside the print volume -> use darker color
     vec3 color = (any(lessThan(delta_box_min, ZERO)) || any(greaterThan(delta_box_max, ZERO))) ? mix(uniform_color.rgb, ZERO, 0.3333) : uniform_color.rgb;
     gl_FragColor = vec4(vec3(intensity.y, intensity.y, intensity.y) + color * intensity.x, uniform_color.a);
diff --git a/resources/shaders/gouraud.vs b/resources/shaders/gouraud.vs
index a226cf312..cc54c1c44 100644
--- a/resources/shaders/gouraud.vs
+++ b/resources/shaders/gouraud.vs
@@ -28,13 +28,18 @@ struct PrintBoxDetection
 
 uniform PrintBoxDetection print_box;
 
+// Clipping plane, x = min z, y = max z. Used by the FFF and SLA previews to clip with a top / bottom plane.
+uniform vec2 z_range;
+// Clipping plane - general orientation. Used by the SLA gizmo.
+uniform vec4 clipping_plane;
+
 // x = tainted, y = specular;
 varying vec2 intensity;
 
 varying vec3 delta_box_min;
 varying vec3 delta_box_max;
 
-varying vec3 world_pos;
+varying vec3 clipping_planes_dots;
 
 void main()
 {
@@ -66,8 +71,11 @@ void main()
     {
         delta_box_min = ZERO;
         delta_box_max = ZERO;
-    }    
+    }
 
     gl_Position = ftransform();
-    world_pos = vec3(print_box.volume_world_matrix * gl_Vertex);
-} 
+    // Point in homogenous coordinates.
+    vec4 world_pos = print_box.volume_world_matrix * gl_Vertex;
+    // Fill in the scalars for fragment shader clipping. Fragments with any of these components lower than zero are discarded.
+    clipping_planes_dots = vec3(dot(world_pos, clipping_plane), world_pos.z - z_range.x, z_range.y - world_pos.z);
+}