Старый но рабочий

cutoutFragmentClear: `#define GLSLIFY 1
        varying vec2 vMaskCoord;
        varying vec2 vTextureCoord;
        uniform vec2 scale_diff;
        uniform sampler2D uSampler;
        uniform sampler2D mask;
        uniform float alpha;
        uniform float r;
        uniform float g;
        uniform float b;
        // Coords
        uniform float w;
        uniform float h;
        uniform float x;
        uniform vec4 maskClamp;
        uniform float y;
        uniform bool invert;

        varying vec4 temp;
        void main(void) {
           vec2 maskyCord = (vTextureCoord - (vec2(1.0/w,1.0/h))-vec2(x/w,y/h));

            maskyCord.x = clamp(maskyCord.x, 0., 1.0);
            maskyCord.y = clamp(maskyCord.y, 0., 1.0);

           vec4 color = texture2D(uSampler, vTextureCoord);
           vec4 masky = texture2D(mask, maskyCord);
           vec4 colorCoord = texture2D(uSampler, vTextureCoord);

           if(colorCoord.a == 0.0) {
            gl_FragColor = colorCoord;
           } else {
            if(invert) {
                if (masky.a != 1.0 && maskyCord.x < 1.0 && maskyCord.y < 1.0) {
                    color = vec4(color.rgb, 1.0) * masky.a;
                }
               } else {
                if (masky.a != 0.0 && maskyCord.x < 1.0 && maskyCord.y < 1.0) {
                    color = vec4(color.rgb, 1.0) * (1. - masky.a);
                }
               }

                gl_FragColor = color;
           }
        }`,