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vec2 offsetr = vec2(trail.r * 0.003);
vec2 offsetg = vec2(trail.r * 0.005);
vec2 offsetb = vec2(trail.r * 0.007);
float r = texture2D(uScene, uv.xy + offsetr).x;
float g = texture2D(uScene, uv.xy + offsetg).y;
float b = texture2D(uScene, uv.xy + offsetb).z;
vec3 color = vec3(r, g, b);
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