diff --git a/scripts/node_pixel_math/node_pixel_math.gml b/scripts/node_pixel_math/node_pixel_math.gml
index 4b24c08db..92b8d05df 100644
--- a/scripts/node_pixel_math/node_pixel_math.gml
+++ b/scripts/node_pixel_math/node_pixel_math.gml
@@ -27,7 +27,7 @@ function Node_Pixel_Math(_x, _y, _group = noone) : Node_Processor(_x, _y, _group
 	__init_mask_modifier(2); // inputs 5, 6, 
 	
 	_scroll = array_clone(global.node_math_scroll, 1);
-	array_append(_scroll, ["Less than", "Greater than"]);
+	array_append(_scroll, ["Less than", "Less than equal", "Greater than", "Greater than equal"]);
 	newInput(7, nodeValue_Enum_Scroll("Operator", self, 0, _scroll));
 	
 	newInput(8, nodeValue_Vec4("Operand", self, [ 0, 0, 0, 0 ]));
diff --git a/shaders/sh_outline/sh_outline.fsh b/shaders/sh_outline/sh_outline.fsh
index 98b8d066e..bcd53feec 100644
--- a/shaders/sh_outline/sh_outline.fsh
+++ b/shaders/sh_outline/sh_outline.fsh
@@ -92,8 +92,8 @@ void checkPixel(vec2 px, vec2 p) {
 	if(side == 0 && crop_border == 1 && (txs.x < 0. || txs.x > 1. || txs.y < 0. || txs.y > 1.)) return;
 	
 	vec4 sam = sampleTexture( gm_BaseTexture, txs );
-	if(side == 0 && sam.a > 0.) return; //inside border,  skip if current pixel is filled
-	if(side == 1 && sam.a < 1.) return; //outside border, skip if current pixel is empty
+	if(side == 0 && sam.a == 1.) return; //inside border,  skip if current pixel is filled
+	if(side == 1 && sam.a == 0.) return; //outside border, skip if current pixel is empty
 	
 	isOutline = true;
 	
diff --git a/shaders/sh_pixel_math/sh_pixel_math.fsh b/shaders/sh_pixel_math/sh_pixel_math.fsh
index f89f6c03c..eb36ffcde 100644
--- a/shaders/sh_pixel_math/sh_pixel_math.fsh
+++ b/shaders/sh_pixel_math/sh_pixel_math.fsh
@@ -109,11 +109,23 @@ void main() {
         res.a = 1.;
         
     } else if(operator == 19) { 
+        res.r = res.r <= op.r? 1. : 0.;
+        res.g = res.g <= op.g? 1. : 0.;
+        res.b = res.b <= op.b? 1. : 0.;
+        res.a = 1.;
+        
+    } else if(operator == 20) { 
         res.r = res.r > op.r? 1. : 0.;
         res.g = res.g > op.g? 1. : 0.;
         res.b = res.b > op.b? 1. : 0.;
         res.a = 1.;
         
+    } else if(operator == 21) { 
+        res.r = res.r >= op.r? 1. : 0.;
+        res.g = res.g >= op.g? 1. : 0.;
+        res.b = res.b >= op.b? 1. : 0.;
+        res.a = 1.;
+        
     }
     
     gl_FragColor = res;