void main() vec2 texelSize = 1.0 / vec2(800.0, 600.0); // Adjust to your resolution
if (edge > 0.2) gl_FragColor = vec4(0.0, 0.0, 0.0, 1.0); // Black outline else gl_FragColor = center;
Eaglercraft does not support traditional GLSL shader packs (like SEUS, BSL, or Complementary Shaders) that you use in standard Java Edition Minecraft. shaders for eaglercraft
Eaglercraft runs on , not Java and OpenGL. Traditional shader mods (OptiFine, Iris) cannot be ported directly. What Eaglercraft Can Do (WebGL Shaders) Eaglercraft uses WebGL shaders internally for its rendering pipeline. These are written in GLSL ES (OpenGL ES Shading Language) , not the full GLSL used by Java Minecraft.
// Fragment Shader - Toon Outline Effect precision mediump float; uniform sampler2D u_texture; varying vec2 v_texCoord; void main() vec2 texelSize = 1
// Detect edges using luminance difference float edge = 0.0; edge += abs(center.r - left.r); edge += abs(center.r - right.r); edge += abs(center.g - up.g); edge += abs(center.b - down.b);
// Sample neighboring pixels vec4 center = texture2D(u_texture, v_texCoord); vec4 left = texture2D(u_texture, v_texCoord - vec2(texelSize.x, 0.0)); vec4 right = texture2D(u_texture, v_texCoord + vec2(texelSize.x, 0.0)); vec4 up = texture2D(u_texture, v_texCoord - vec2(0.0, texelSize.y)); vec4 down = texture2D(u_texture, v_texCoord + vec2(0.0, texelSize.y)); What Eaglercraft Can Do (WebGL Shaders) Eaglercraft uses
To use these: Download the client HTML file → Open in browser → Look for a or Post Processing button in the settings. Method 2: Inject Custom Shader via DevTools (Advanced) You can inject WebGL shader code into any Eaglercraft client using the browser console: