diff --git a/shader.glsl b/shader.glsl
index bda7fe9..623f066 100644
--- a/shader.glsl
+++ b/shader.glsl
@@ -182,7 +182,7 @@ vec3 map(vec3 p, int displace)
         d2 = min(d2, step);
         stepDist += .2;
     }
-    d2 += noise(p.xz * 50.+200., .01, 0); // - noise (p.yz*2.+1.5, 0.15,0);
+    d2 += noise(p.xz * 50.+200., .01, 0) - noise (p.yz*2.+1.5, 0.15,0);
     d = min(d, d2);
     if (d==d2) mat = 2.0;
 
@@ -234,7 +234,7 @@ vec3 map(vec3 p, int displace)
             // glyph locking prism material
             if( d == prismTop) if(u_time > rotateDelay + .2) {
                 mat = 5.;
-                glo = prismTop;
+                glo = min(d2, prismTop);
             }
         }
     }
@@ -247,16 +247,18 @@ vec3 map(vec3 p, int displace)
 ////////////////
 
 float rayMarch(vec3 ro, vec3 rd, int a) {
-    float d,t = 0.; // total distance travelled
+    vec3 d;
+    float t = 0.; // total distance travelled
     // Raymarching
     for (int i = 0; i < 100; i++) {
-        d = map(ro + rd * t, 0).x; // Get distance to objects
-        if (a==0) glow += 0.05/(1.0 + 10.*pow(map(ro + rd * t, 0).z, .5));
-        t += d; // "march" the ray
-        if (d < 1e-4 || t > 600.) break;
+        d = map(ro + rd * t, 0); // Get distance to objects
+        if (a==0) glow += 0.05/(1.0 + 10.*pow(d.z, .5));
+        t += d.x; // "march" the ray
+        if (d.x < 1e-3 || t > 400.) break;
     }
     return t;
 }
+
 vec3 getNormal(vec3 p) {
     vec2 e = vec2(.01, 0.);
     vec3 n = map(p, 1).x - vec3(