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:

// 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));

if (edge > 0.2) gl_FragColor = vec4(0.0, 0.0, 0.0, 1.0); // Black outline else gl_FragColor = center;