you might wanna crank up your custom graphic settings for dota2, maybe even just for the shot, add antialias and such. looks better, there is a post about that on the last couple of pages in the dota2 workshop trhead
Ah, Dota2 at least uses the source engine though, no? And to actually make them playable within dota2 itself you would certainly need the same engine.. But for a rebuild, any size which works would do? :3