diff --git a/src/Shaders/MarchingAntsOutline.gdshader b/src/Shaders/MarchingAntsOutline.gdshader
index c7c883b65..2b99519b3 100644
--- a/src/Shaders/MarchingAntsOutline.gdshader
+++ b/src/Shaders/MarchingAntsOutline.gdshader
@@ -10,6 +10,11 @@ uniform float frequency = 50.0;
 uniform float stripe_direction : hint_range(0, 1) = 0.5;
 
 
+bool is_zero_approx(float num) {
+	return num < 0.0001;
+}
+
+
 bool has_contrary_neighbour(vec2 uv, vec2 texture_pixel_size, sampler2D tex) {
 	float i = -ceil(width);
 	float j = ceil(width);
@@ -21,7 +26,7 @@ bool has_contrary_neighbour(vec2 uv, vec2 texture_pixel_size, sampler2D tex) {
 	vec2 xy1 = uv + texture_pixel_size * vec2(x1, y1);
 	vec2 xy2 = uv + texture_pixel_size * vec2(x2, y2);
 
-	if (xy1 != clamp(xy1, vec2(0.0), vec2(1.0)) || texture(tex, xy1).a == 0.0 || xy2 != clamp(xy2, vec2(0.0), vec2(1.0)) || texture(tex, xy2).a == 0.0) {
+	if (xy1 != clamp(xy1, vec2(0.0), vec2(1.0)) || is_zero_approx(texture(tex, xy1).a) || xy2 != clamp(xy2, vec2(0.0), vec2(1.0)) || is_zero_approx(texture(tex, xy2).a)) {
 		return true;
 	}