diff --git a/shaders/blit.frag b/shaders/blit.frag
index 9aeaae0..ee563e0 100644
--- a/shaders/blit.frag
+++ b/shaders/blit.frag
@@ -15,36 +15,13 @@ layout(std140, set = 3, binding = 0) uniform UniformBlock {
   vec4  cam_pos;
 };
 
-float road(float x) { return cos(x); }
-
-vec3 backup(vec2 uv) {
-  float time = time_padded.x;
-  float x_scale = time * 12.0;
-  float y_scale = uv.x;
-
-  uv.x *= x_scale;
-  uv.y *= 2.0;
-  uv.y -= 1.0;
-  uv.y /= 0.75;
-  uv.y /= y_scale;
-
-  float y = road(uv.x);
-
-  float dist = length(uv.y - y);
-
-  vec3 col = vec3(cos(time / 10.0)) - vec3(exp(-dist), cos(dist), sin(dist));
-  return (0.005 * (1.2 + abs(cos(time)))) / col;
-}
-
 const int MAX_MARCH_STEPS = 64;
 const float EPS_DIST = 1e-6;
 
-float sdf(vec3 point) {
+
+float sdf(vec3 point){
   float time = time_padded.x;
-  float size = 8.0 + (3.0* sin(time));
-  vec3 s1_local = mod(point, vec3(size)) - vec3(size/2.0);
-  float s1 = length(s1_local) - 0.3;
-  return s1;
+  return abs(length(point) - (point.x * point.y - point.z));
 }
 
 vec3 getnormal(vec3 p) {
@@ -56,8 +33,6 @@ vec3 getnormal(vec3 p) {
     ));
 }
 
-
-
 vec4 march(vec3 point, vec3 ray, float max_depth) {
   float totaldist = 0.0;
 
@@ -104,8 +79,6 @@ float linearize_depth(vec2 uv) {
 }
 
 void main() {
-  vec2 bg = (projection * view * vec4(uv, 1.0, 1.0)).xy;
-  vec3 b = backup(bg);
   float max_depth = linearize_depth(uv);
   vec4 hit = kernel(max_depth);
   if (hit.w > 0.0) {
diff --git a/src/camera.cpp b/src/camera.cpp
index ae6d36e..610bfcd 100644
--- a/src/camera.cpp
+++ b/src/camera.cpp
@@ -44,7 +44,7 @@ void Camera::on_key(SDL_Scancode scancode, bool pressed) {
     case SDL_SCANCODE_RIGHT: look_right    = pressed; break;
     case SDL_SCANCODE_LSHIFT:
     case SDL_SCANCODE_RSHIFT: 
-      shifted |= pressed;
+      shifted = pressed;
     break;
     default: break;
   }