Pixel-Composer/build/Windows/0/cache/sh_draw_grey_alpha.shader

//
// Simple passthrough vertex shader
//
attribute vec3 in_Position;                  // (x,y,z)
//attribute vec3 in_Normal;                  // (x,y,z)     unused in this shader.
attribute vec4 in_Colour;                    // (r,g,b,a)

varying vec4 v_vColour;

void main() {
    vec4 object_space_pos = vec4( in_Position.x, in_Position.y, in_Position.z, 1.0);
    gl_Position = gm_Matrices[MATRIX_WORLD_VIEW_PROJECTION] * object_space_pos;
    
    v_vColour = in_Colour;
}

//######################_==_YOYO_SHADER_MARKER_==_######################@~
varying vec4 v_vColour;

uniform vec2 smooth;

void main() {
	float grey = (v_vColour.r + v_vColour.g + v_vColour.b) / 3. * v_vColour.a;
	grey = smoothstep(smooth.x, smooth.y, grey);
	
    gl_FragColor = vec4(vec3(1.), grey);
}