diff --git a/manimlib/shaders/inserts/get_gl_Position.glsl b/manimlib/shaders/inserts/get_gl_Position.glsl
index fd0e4605..2f9d8934 100644
--- a/manimlib/shaders/inserts/get_gl_Position.glsl
+++ b/manimlib/shaders/inserts/get_gl_Position.glsl
@@ -6,8 +6,7 @@
 const vec2 DEFAULT_FRAME_SHAPE = vec2(8.0 * 16.0 / 9.0, 8.0);
 
 float perspective_scale_factor(float z, float focal_distance){
-    // TODO, what happens when focal_distance < z?
-    return focal_distance / (focal_distance - z);
+    return max(0.0, focal_distance / (focal_distance - z));
 }
 
 
@@ -16,10 +15,13 @@ vec4 get_gl_Position(vec3 point){
     if(!bool(is_fixed_in_frame)){
         result.x *= 2.0 / frame_shape.x;
         result.y *= 2.0 / frame_shape.y;
-        result.xy *= perspective_scale_factor(result.z, focal_distance);
-        // TODO, what's the better way to do this?
-        // This is to keep vertices too far out of frame from getting cut.
-        result.z *= 0.01;
+        float psf = perspective_scale_factor(result.z, focal_distance);
+        if (psf > 0){
+            result.xy *= psf;
+            // TODO, what's the better way to do this?
+            // This is to keep vertices too far out of frame from getting cut.
+            result.z *= 0.01;
+        }
     } else{
         result.x *= 2.0 / DEFAULT_FRAME_SHAPE.x;
         result.y *= 2.0 / DEFAULT_FRAME_SHAPE.y;