// Sample current scene (you'd need the actual scene texture) // For simplicity: just blend previous frame with white/grey vec4 scene = vec4(0.5, 0.5, 0.5, 1.0); // dummy – won't work well
gl_FragColor = result; ⚠️ : This uses two color buffers. To make it work, you must add this to your shaders.properties : # shaders.properties colortex0.clear=true colortex1.clear=true colortex1.colorbuffer=colortex0 This tells OptiFine to keep the previous frame in colortex0 and the new one in colortex1 . 🧪 3. Simple alternative (single‑buffer motion blur) If the above doesn't work on your OptiFine version, here's a simpler version that only uses one color buffer but creates a fade effect: minecraft 1.8.9 motion blur shader
const float fadeFactor = 0.85; // lower = more blur/trail // Sample current scene (you'd need the actual
uniform sampler2D colortex0; // previous frame's color uniform sampler2D colortex1; // current frame's color (for blending) uniform float viewWidth; uniform float viewHeight; uniform float viewHeight
// Simple linear blend between current and previous frame vec4 result = mix(current, previous, blurStrength);
gl_FragColor = current * fadeFactor;
void main() vec4 current = texture2D(colortex1, texcoord); vec4 previous = texture2D(colortex0, texcoord);