VirtualNormalNx.frag.glsl

    vec2 texCoord = /* (e.g. vTexCoord.st) */;
    vec2 texSize = /* (e.g. textureSize (tex, 0)) */;
    float scalingFactor = /* The virtual res the user wants */

    vec2 pixelCoords = texCoord * texSize;

    vec2 subPixel = (fract (pixelCoords) - .5) * 2;
    subPixel = pow (abs (subPixel), vec2 (scalingFactor)) * sign (subPixel) / 2 + .5;
    texCoord = (floor (pixelCoords) + subPixel) / texSize;