diff --git a/Shader/bump.fs b/Shader/bump.fs
index 1520544..f46baeb 100644
--- a/Shader/bump.fs
+++ b/Shader/bump.fs
@@ -59,6 +59,11 @@ vec2 get_parallax_offset_uv(vec2 uv, vec3 view_direction) {
     return current_uv;
 }
 
+// Return a linear interpolation (0..1) of value between low and high, or 0.0 / 1.0 if value is below / above the bounds
+float linear_step(float low, float high, float value) {
+    return clamp((value - low) / (high - low), 0.0, 1.0);
+}
+
 float get_shadow(vec4 fragPosLightSpace, vec3 normal) {
     // perform perspective divide
     mediump vec3 projCoords = fragPosLightSpace.xyz / fragPosLightSpace.w;
@@ -79,10 +84,12 @@ float get_shadow(vec4 fragPosLightSpace, vec3 normal) {
     float p = step(projCoords.z, moments.x);
     // We divide by this later, so make sure it's not exactly 0
     // It seems like it should always be 0.0, but due to interpolation it's not -- it increases with the deviation!
-    float variance = max(moments.y - moments.x * moments.x, 0.00002);
+    // A larger second parameter to max() means more blur (but also more light bleeding)
+    float variance = max(moments.y - moments.x * moments.x, 0.0005);
 
     float d = projCoords.z - moments.x * 1.0; // bias should be "compare", what is that?
-    float p_max = variance / (variance + d * d);
+    // Use linear_step to prevent light bleeding
+    float p_max = linear_step(0.2, 1.0, variance / (variance + d * d));
 
     // If this pixel is exactly in the light, p is 1, so make sure we return that in that case
     // min() to make sure that it doesn't get greater than 1.0