Comments - Drakkheim

That's lovely looking

The other, less computationally intensive approach, is to just make sure that your obstacle assets have a 1 cell border around them that's passable for that annoying diagonal passthru. This is what the old Command and Conquer games did .. even a things like starcraft and TA do it.
Granted you've got more processing time to work with than they did so It'll be interesting to see how it works out. :-D.
Nice bit of work and enjoyed the post, will be following this game.