diff --git a/fragment.glsl b/fragment.glsl
index fb96349..e8e273e 100644
--- a/fragment.glsl
+++ b/fragment.glsl
@@ -48,10 +48,12 @@ void main() {
     vec2 tile_uv = (uv - c_tl) / cell_size;
 
     // lerp index
-    float u = fade(tile_uv.x);
-    float v = fade(tile_uv.y);
+    //float u = fade(tile_uv.x);
+    //float v = fade(tile_uv.y);
     //float u = tile_uv.x;
     //float v = tile_uv.y;
+    float u = smoothstep(0, 1, tile_uv.x);
+    float v = smoothstep(0, 1, tile_uv.y);
     //float val = smoothstep(tile_uv.x, smoothstep(tile_uv.y, c_bl_dot, c_tl_dot), smoothstep(tile_uv.y, c_br_dot, c_tr_dot));
     float val = lerp(lerp(c_tl_dot, c_bl_dot, v), lerp(c_tr_dot, c_br_dot, v), u);
     //float val = tile_uv.y;