Pixel-Composer/shaders/sh_solid/sh_solid.fsh

//
// Simple passthrough fragment shader
//
varying vec2 v_vTexcoord;
varying vec4 v_vColour;

void main() {
	gl_FragColor = vec4(v_vColour.rgb, texture2D( gm_BaseTexture, v_vTexcoord ).a * v_vColour.a);
}