The current method for implementing darkvision is to have a token emit light to the appropriate radius, with dim light starting at 0 or -5 or whatever. This is a decent way of doing it, but not really ideal. I mostly play D&D 5e, and it'd be nice to see that style of darkvision represented. Imagine a separate darkvision option, beneath all the other lighting stuff (so a character can have darkvision and hold a torch simultaneously!) , wherein you input the radius, and all dark areas within that distance from the token are upgraded to dim light, and dim to bright. There could even be a couple of checkboxes for options such as disabling the darkvision when standing in bright light, and for having the revealed dark areas shown in grayscale. It'd be cool. Also, there might as well be an option to make it act like 4e's Low-Light Vision, instead. That is, it upgrades dim to bright, but leaves darkness alone. This one isn't really needed, on its own, but if the darkvision is implemented, it's just a quick add-on that'd be nice. Preferably as a third checkbox or as a dropdown menu (Normal, Low-Light, Darkvision). EDIT: A thought: Just replace the "Has Sight" checkbox with a dropdown menu (labeled "Sight") with the options: None, Normal, Low-Light, and Darkvision. Then have the fields for radius and probably angle, followed by the aforementioned checkboxes. (On a related note, it'd be neat if the GM could modify the hardness of the gradient between dim light and darkness. It fades really smoothly now, which is nice looking, but sometimes I think it might be nice to have a more clearly defined edge, especially for something like this... but that's a separate issue!)