Oh my g. That is really looking cool! Um, I am not familiar with axe, but I know how to do it in regular assembly (making vertical lines). But yeah, are you familiar with making tilemap data? Each byte can be a tile. Like, if the byte is 00, draw nothing, if it is 01, draw just the tile, if it is 02, draw a tree, if it is 03, draw a tile and a tree. Pretty much, if the number is odd, draw a tile and a pic, if it is even, draw a pic. I might be able to make some random opcodes...

Yep, I'm familiar with tilemap data... but this is awkward.  I need an X, Y, and Z coordinate for each tile, as well as tile type.

For drawing vertical lines, you could use Line() or Rect() with a width of 1.

Oh wow.. thanks I totally forgot Rect(). That totally solves all of my problems!!! 

and yeah, I tried the line function... it kept randomly giving negative numbers, and was way too slow.

You only need to map the top part of each column, right? So you could arrange everything by X and Y, then before drawing the object, draw the vertical connector lines. This way, they would be erased by the tile when it's drawn. I'll make a mock up later after I finish my HW.

That even leaves a possible optimization

Yay! It's recognizable!  Now even more so

Got vertical lines working (came out to 4 Rect(/RectI( commands per tile, virtually bug-free, see screenie for only known bug)

Now what should water look like?  Transparent or just a couple waves?  Should it look different on the sides?

I had a little trouble with the new tiles.  Turns out Pt-Mask( and FlipH( don't like each other.  The back layer gets flipped, but the front doesn't.  Spits out garbage instead of a pretty tile... So I had to include images for the flipped tiles instead.

Darn that looks so impressive! Great job! I always wanted to see an isometric game. I hope someone makes one for calcs. Would it be possible to not lose speed if you add blocks at the bottom so it won't look like floating blocks, though? Because if yes, then someone could maybe redo Kirby's Dream Course (Kirby Bowl) for calcs.

Well, I do have it displaying the blocks at the bottom at a better speed than before... probably not good enough for like a racing game, but perfect for an rpg, methinks.   Of course, I'll still try and make it faster.

So was I right.  Is it from Final Fantasy Tactics Advance?

Yep

Is this just an engine or everyone to use?  Or are you planning to make a game with it first.
(Hint^ )

Yes, and yes. I don't mind whatsoever if anybody wants to use this (or just parts), but the sprites are currently being oriented towards a Tactics game I fully intend to make.

Normally I avoid saying this unless I absolutely think something is awesome, but:

holyfuckingshitholyfuckingshitholyfuckingshit sw33t