// if the blueprint I sent breaks, which it's prone to do when sent via text, here is the code of the two custom nodes.

// -- HLSL Dither --

struct Functions
{
int4x4 DitherTable;
};

Functions func;

func.DitherTable = int4x4(
-4,    0,    -3,    1,
2,    -2,    3,    -1, 
-3,    1,    -4,    0, 
3,    -1,    2,    -2
);

int dither;

dither = func.DitherTable[uv.x % 4][uv.y % 4];

col += dither;
return col;

// -- HLSL Truncate --

// Thanks to ompuco for this snippet of code for colour truncation.
col = lerp((uint3(col) & 0xf8), 0xf8, step(0xf8,col));
col/=255;
return col;