Thanks EER,
Thats about where i'm at in my head, just didnt know if there was a way to grid on one layer while changing the size of the picture layer to "fit" the grid. Let me try to explain. Simplified, its for a knitting pattern for my grandma, and like everyone, i dont wanna disappoint granny.
I'm not sure if original size matters, say the pic has a pixel size of 1200X1200. If i use Pixelate+ to change the cell size to 12, i can match that up with a grid step of 12, to get something like the bottom pic of the giraffe (detail is perfect, grid size too small). If i change both the cell size and grid step to 24 and keep the same resolution, it looks more like the top pic (grid perfect, detail lost!). Changing only one of the two variables puts more pixelated detail in each block of the grid, and i'm trying to keep it to one solid color per grid block. I'd like to keep the grid size as the constant at 24. I've tried changing the res, the pixel size, and any combo of anything else i can think of, but keep arriving at having to change to grid size to suit. I'm now thinking that i can't 'pull apart' the two layers (ie zoom out on the pic, but not the grid) It's hard to explain. Go small at high res, go large at low res? I feel like i have all the pieces, just can't put the puzzle together..