precision mediump float; varying vec2 TexCoord; uniform sampler2D Texture; void main() { vec4 texColor = texture2D(Texture, TexCoord).rgba; //gl_FragColor = texColor; gl_FragColor = vec4(texColor.rgb*2.0 + vec3(0.2, 0.2, 0.2), texColor.a); //gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0); }