When I call map(), only the top layer is drawn. How do I draw all the layers at once? It doesn't seem like there is any parameter to change which layers to draw, but maybe I just haven't figured out which parameter it is.

Try this code:

for i=3,1,-1 do -- replace the '3' with however many layers you have
    -- only giving the first argument in this example, but
    -- you can continue to supply arguments as needed
    map(fetch"map/0.map"[i].bmp)
end

I couldn't figure out how to get mget to target other layers though... :/

@Kaius I think mget might be hard-coded to use 0.gfx... That's a problem because the workaround (indexing the .bmp directly) crashes picotron for me and doesn't show it in the log file.

Here's how I've been using mget on other layers.

function mget(x, y, layer, mapfile)
    mapfile = mapfile or fetch("map/0.map")
    return mapfile[layer or 1].bmp:get(x,y)
end

I'm not sure how this works with multiple gfx files, though.

@ooooggll Oh! You can use :get(x, y), cool!

Edit: Yay, it doesn't crash with this! also, you probably want to and it with 0x3fff, to remove the flip bits