The colours (green, blue, red, purple) represent an 8x zoom pixel - a pixel created out of 64 smaller pixels. The number of white pixels in each 8x zoom pixel is the first value (green is 4px, blue is 19px, etc) and the percentage is generated from the number of white pixels (green is 4px, blue is 19px, etc) over the total (64px). This percentage then corresponds to a colour value. The 6% represented by the green colour is essentially 6% white. This 6% white is the AA colour that should be used in place of the green 8x zoom pixel.

I don't know how well I explained that...

I often feel the need for more pen colours. Often my sketches start off as three or four colour pieces to lay volumes down and I can't help thinking that it'd be nice if i had a hot key to use another pen colour. When i'm in promotion this problem is solved by the colour cycling hotkeys but the 4 pen system definitely interests me.

have you ever tried working without a lineart? Painting blobs of colour for shading and highlights and gradually adding detail to the blobs? You might find that it gives you much more realistic volumes. Currently i think that your head in the lineart is too large. You might want to get further along before asking for c+c though. If there isn't much to see people won't have much to say.

New Zealand has red stars. Australian flag would be 9th from the left in the back row.

As for the piece itself it doesn't look like enough thought has gone into the design and not enough effort has gone into the execution. This is likely due to the large size.

Hi mjau. I'm glad you liked it. Sorry it took so long to reply. My flight home got cancelled :/
This is the second time I haven't received anything I hope its still coming.
Everyone did well though. This is always my favourite time of the forum year