diff --git a/build.gradle b/build.gradle
index 54b6a56..e9e241a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -17,7 +17,7 @@ buildscript {
 
 apply plugin: 'forge'
 
-version = "1.3.0"
+version = "1.3.1"
 group= "coloredlightscore"
 archivesBaseName = "ColoredLightsCore"
 
diff --git a/src/main/resources/shaders/lightOverlay.frag b/src/main/resources/shaders/lightOverlay.frag
index bf16a6a..565175b 100644
--- a/src/main/resources/shaders/lightOverlay.frag
+++ b/src/main/resources/shaders/lightOverlay.frag
@@ -5,34 +5,42 @@ uniform sampler2D LightMap;
 varying vec2 p_TexCoord;
 varying vec4 p_Color;
 varying vec4 p_LightCoord;
-uniform vec4 u_LightCoord;
+uniform ivec4 u_LightCoord;
 
 void main() {
     float scale = 256;
     float bias = 0.5;
-
-    // required state:
-    // LightMap GL_TEXTURE_MIN_FILTER GL_LINEAR
-    //	    GL_TEXTURE_MAG_FILTER GL_LINEAR
-    //	    GL_TEXTURE_WRAP_S	  GL_CLAMP_TO_EDGE
-    //	    GL_TEXTURE_WRAP_T	  GL_CLAMP_TO_EDGE
-
-    // exploit separability of *-linear interpolation:
-
-    // hardware does the bilinear interpolation for the zw channels
-    vec4 texel00 = texture2D(LightMap, (floor(p_LightCoord.xy + vec2(0, 0)) * 16 + p_LightCoord.zw) / scale);
-    vec4 texel01 = texture2D(LightMap, (floor(p_LightCoord.xy + vec2(0, 1)) * 16 + p_LightCoord.zw) / scale);
-    vec4 texel10 = texture2D(LightMap, (floor(p_LightCoord.xy + vec2(1, 0)) * 16 + p_LightCoord.zw) / scale);
-    vec4 texel11 = texture2D(LightMap, (floor(p_LightCoord.xy + vec2(1, 1)) * 16 + p_LightCoord.zw) / scale);
-
-    vec2 factors = fract(p_LightCoord.xy);
-
-    // do the y interpolation steps ourselves
-    vec4 y0 = mix(texel00, texel01, factors.y);
-    vec4 y1 = mix(texel10, texel11, factors.y);
-
-    // finally do the x step between the y results
-    vec4 lightColor = mix(y0, y1, factors.x);
-
+    vec4 texel0000 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(0, 0)) * 16 + (floor(p_LightCoord.zw + vec2(0, 0)) + bias)) / scale, 0, 1));
+    vec4 texel0001 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(0, 0)) * 16 + (floor(p_LightCoord.zw + vec2(0, 1)) + bias)) / scale, 0, 1));
+    vec4 texel0010 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(0, 0)) * 16 + (floor(p_LightCoord.zw + vec2(1, 0)) + bias)) / scale, 0, 1));
+    vec4 texel0011 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(0, 0)) * 16 + (floor(p_LightCoord.zw + vec2(1, 1)) + bias)) / scale, 0, 1));
+    vec4 texel0100 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(0, 1)) * 16 + (floor(p_LightCoord.zw + vec2(0, 0)) + bias)) / scale, 0, 1));
+    vec4 texel0101 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(0, 1)) * 16 + (floor(p_LightCoord.zw + vec2(0, 1)) + bias)) / scale, 0, 1));
+    vec4 texel0110 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(0, 1)) * 16 + (floor(p_LightCoord.zw + vec2(1, 0)) + bias)) / scale, 0, 1));
+    vec4 texel0111 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(0, 1)) * 16 + (floor(p_LightCoord.zw + vec2(1, 1)) + bias)) / scale, 0, 1));
+    vec4 texel1000 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(1, 0)) * 16 + (floor(p_LightCoord.zw + vec2(0, 0)) + bias)) / scale, 0, 1));
+    vec4 texel1001 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(1, 0)) * 16 + (floor(p_LightCoord.zw + vec2(0, 1)) + bias)) / scale, 0, 1));
+    vec4 texel1010 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(1, 0)) * 16 + (floor(p_LightCoord.zw + vec2(1, 0)) + bias)) / scale, 0, 1));
+    vec4 texel1011 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(1, 0)) * 16 + (floor(p_LightCoord.zw + vec2(1, 1)) + bias)) / scale, 0, 1));
+    vec4 texel1100 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(1, 1)) * 16 + (floor(p_LightCoord.zw + vec2(0, 0)) + bias)) / scale, 0, 1));
+    vec4 texel1101 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(1, 1)) * 16 + (floor(p_LightCoord.zw + vec2(0, 1)) + bias)) / scale, 0, 1));
+    vec4 texel1110 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(1, 1)) * 16 + (floor(p_LightCoord.zw + vec2(1, 0)) + bias)) / scale, 0, 1));
+    vec4 texel1111 = texture2D(LightMap, clamp((floor(p_LightCoord.xy + vec2(1, 1)) * 16 + (floor(p_LightCoord.zw + vec2(1, 1)) + bias)) / scale, 0, 1));
+    vec4 lightColor =   texel0000 * (1 - fract(p_LightCoord.x)) * (1 - fract(p_LightCoord.y)) * (1 - fract(p_LightCoord.z)) * (1 - fract(p_LightCoord.w)) +
+                        texel0001 * (1 - fract(p_LightCoord.x)) * (1 - fract(p_LightCoord.y)) * (1 - fract(p_LightCoord.z)) * fract(p_LightCoord.w) +
+                        texel0010 * (1 - fract(p_LightCoord.x)) * (1 - fract(p_LightCoord.y)) * fract(p_LightCoord.z) * (1 - fract(p_LightCoord.w)) +
+                        texel0011 * (1 - fract(p_LightCoord.x)) * (1 - fract(p_LightCoord.y)) * fract(p_LightCoord.z) * fract(p_LightCoord.w) +
+                        texel0100 * (1 - fract(p_LightCoord.x)) * fract(p_LightCoord.y) * (1 - fract(p_LightCoord.z)) * (1 - fract(p_LightCoord.w)) +
+                        texel0101 * (1 - fract(p_LightCoord.x)) * fract(p_LightCoord.y) * (1 - fract(p_LightCoord.z)) * fract(p_LightCoord.w) +
+                        texel0110 * (1 - fract(p_LightCoord.x)) * fract(p_LightCoord.y) * fract(p_LightCoord.z) * (1 - fract(p_LightCoord.w)) +
+                        texel0111 * (1 - fract(p_LightCoord.x)) * fract(p_LightCoord.y) * fract(p_LightCoord.z) * fract(p_LightCoord.w) +
+                        texel1000 * fract(p_LightCoord.x) * (1 - fract(p_LightCoord.y)) * (1 - fract(p_LightCoord.z)) * (1 - fract(p_LightCoord.w)) +
+                        texel1001 * fract(p_LightCoord.x) * (1 - fract(p_LightCoord.y)) * (1 - fract(p_LightCoord.z)) * fract(p_LightCoord.w) +
+                        texel1010 * fract(p_LightCoord.x) * (1 - fract(p_LightCoord.y)) * fract(p_LightCoord.z) * (1 - fract(p_LightCoord.w)) +
+                        texel1011 * fract(p_LightCoord.x) * (1 - fract(p_LightCoord.y)) * fract(p_LightCoord.z) * fract(p_LightCoord.w) +
+                        texel1100 * fract(p_LightCoord.x) * fract(p_LightCoord.y) * (1 - fract(p_LightCoord.z)) * (1 - fract(p_LightCoord.w)) +
+                        texel1101 * fract(p_LightCoord.x) * fract(p_LightCoord.y) * (1 - fract(p_LightCoord.z)) * fract(p_LightCoord.w) +
+                        texel1110 * fract(p_LightCoord.x) * fract(p_LightCoord.y) * fract(p_LightCoord.z) * (1 - fract(p_LightCoord.w)) +
+                        texel1111 * fract(p_LightCoord.x) * fract(p_LightCoord.y) * fract(p_LightCoord.z) * fract(p_LightCoord.w);
     gl_FragColor = texture2D(Texture, p_TexCoord) * p_Color * lightColor;
 }
\ No newline at end of file
diff --git a/src/main/resources/shaders/lightOverlay.vert b/src/main/resources/shaders/lightOverlay.vert
index 1e77afc..c3ee810 100644
--- a/src/main/resources/shaders/lightOverlay.vert
+++ b/src/main/resources/shaders/lightOverlay.vert
@@ -2,7 +2,7 @@
 
 uniform sampler2D Texture;
 uniform sampler2D LightMap;
-uniform vec4 u_LightCoord;
+uniform ivec4 u_LightCoord;
 attribute vec2 TexCoord;
 varying vec2 p_TexCoord;
 attribute vec4 LightCoord;
@@ -13,7 +13,7 @@ void main() {
     gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
     p_TexCoord = TexCoord;
     p_Color = gl_Color;
-    if (u_LightCoord == vec4(0.0, 0.0, 0.0, 0.0)) {
+    if (u_LightCoord == ivec4(0, 0, 0, 0)) {
         p_LightCoord = LightCoord;
     } else {
         p_LightCoord = u_LightCoord;
diff --git a/src/main/resources/shaders/lightOverlayExp.frag b/src/main/resources/shaders/lightOverlayExp.frag
new file mode 100644
index 0000000..bf16a6a
--- /dev/null
+++ b/src/main/resources/shaders/lightOverlayExp.frag
@@ -0,0 +1,38 @@
+#version 120
+
+uniform sampler2D Texture;
+uniform sampler2D LightMap;
+varying vec2 p_TexCoord;
+varying vec4 p_Color;
+varying vec4 p_LightCoord;
+uniform vec4 u_LightCoord;
+
+void main() {
+    float scale = 256;
+    float bias = 0.5;
+
+    // required state:
+    // LightMap GL_TEXTURE_MIN_FILTER GL_LINEAR
+    //	    GL_TEXTURE_MAG_FILTER GL_LINEAR
+    //	    GL_TEXTURE_WRAP_S	  GL_CLAMP_TO_EDGE
+    //	    GL_TEXTURE_WRAP_T	  GL_CLAMP_TO_EDGE
+
+    // exploit separability of *-linear interpolation:
+
+    // hardware does the bilinear interpolation for the zw channels
+    vec4 texel00 = texture2D(LightMap, (floor(p_LightCoord.xy + vec2(0, 0)) * 16 + p_LightCoord.zw) / scale);
+    vec4 texel01 = texture2D(LightMap, (floor(p_LightCoord.xy + vec2(0, 1)) * 16 + p_LightCoord.zw) / scale);
+    vec4 texel10 = texture2D(LightMap, (floor(p_LightCoord.xy + vec2(1, 0)) * 16 + p_LightCoord.zw) / scale);
+    vec4 texel11 = texture2D(LightMap, (floor(p_LightCoord.xy + vec2(1, 1)) * 16 + p_LightCoord.zw) / scale);
+
+    vec2 factors = fract(p_LightCoord.xy);
+
+    // do the y interpolation steps ourselves
+    vec4 y0 = mix(texel00, texel01, factors.y);
+    vec4 y1 = mix(texel10, texel11, factors.y);
+
+    // finally do the x step between the y results
+    vec4 lightColor = mix(y0, y1, factors.x);
+
+    gl_FragColor = texture2D(Texture, p_TexCoord) * p_Color * lightColor;
+}
\ No newline at end of file
diff --git a/src/main/resources/shaders/lightOverlayExp.vert b/src/main/resources/shaders/lightOverlayExp.vert
new file mode 100644
index 0000000..1e77afc
--- /dev/null
+++ b/src/main/resources/shaders/lightOverlayExp.vert
@@ -0,0 +1,21 @@
+#version 120
+
+uniform sampler2D Texture;
+uniform sampler2D LightMap;
+uniform vec4 u_LightCoord;
+attribute vec2 TexCoord;
+varying vec2 p_TexCoord;
+attribute vec4 LightCoord;
+varying vec4 p_LightCoord;
+varying vec4 p_Color;
+
+void main() {
+    gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
+    p_TexCoord = TexCoord;
+    p_Color = gl_Color;
+    if (u_LightCoord == vec4(0.0, 0.0, 0.0, 0.0)) {
+        p_LightCoord = LightCoord;
+    } else {
+        p_LightCoord = u_LightCoord;
+    }
+}
\ No newline at end of file