Continually receive IndexError: index 3 is out of bounds for axis 2 with size 3

[alliedcvil]

When trying to generate tiles I receive this with a standard image.

Traceback (most recent call last):
File "tiler.py", line 221, in
main()
File "tiler.py", line 216, in main
img = create_tiled_image(boxes, original_res, render=conf.RENDER)
File "tiler.py", line 186, in create_tiled_image
place_tile(img, box)
File "tiler.py", line 173, in place_tile
mask = box['tile'][:, :, 3] != 0
IndexError: index 3 is out of bounds for axis 2 with size 3

[nuno-faria]

It should be fixed now. Give it a try and let me know.