diff --git a/shaders/rotation.fs b/shaders/rotation.fs
index d8d63b3..3f81c7c 100644
--- a/shaders/rotation.fs
+++ b/shaders/rotation.fs
@@ -7,19 +7,27 @@ uniform float progress;
 in vec2 vsoTexCoord;
 out vec4 fragColor;
 
-void main() {
-  vec2 center = vec2(.5);
+// Fonction de déformation
+vec2 deform(float progression) {
+  vec2 center = vec2(0.5);
   vec2 offset = vsoTexCoord - center;
 
-  float angle = progress * radians(180) * 2;
-  float sinTheta = sin(angle);
+  // Torsion
+  float angle = offset.y * progression * radians(180) * 2;
   float cosTheta = cos(angle);
-  vec2 rotatedOffset = vec2(cosTheta * offset.x - sinTheta * offset.y, sinTheta * offset.x + cosTheta * offset.y);
+  float sinTheta = sin(angle);
+  vec2 twistedOffset = vec2(cosTheta * offset.x - sinTheta * offset.y, sinTheta * offset.x + cosTheta * offset.y);
 
-  vec2 distortedTexCoord = center + rotatedOffset;
+  // Vague
+  float wave = sin(twistedOffset.y * 20);
+  vec2 deformedUV = twistedOffset + vec2(wave * progression, 0);
 
-  vec4 color1 = texture(tex0, vsoTexCoord);
-  vec4 color2 = texture(tex1, distortedTexCoord);
+  return center + deformedUV;
+}
+
+void main() {
+  vec4 color1 = texture(tex0, deform(progress));
+  vec4 color2 = texture(tex1, deform(1. - progress));
 
   fragColor = mix(color1, color2, smoothstep(0., 1., progress));
 }