I'm using small rectangles... not isometric, and placing terrain...
I just tested some trees, and terrians, and diff combinations...and found some things out...
Most of this you guys might already know.. but i didn't til now...
Placing any of the regular tiles(jungle high, dirt high, rock high) via rectangles, can be walked over... except water...
except cliffside pieces(and other weird elevational pieces) under tileset indexed
But i have found 3 ways to make it work...
All of them involve tree doodads... cuz i need the trees.. i need foliage.. jungle... this is not questionable.. it wouldnt be Lost without lots of jungles... i might have to go single rows of tree doodads, instead of double or triple rows side by side like in my screenshot...
I tried sprites only...but all of them can be walked through, and i can place more doodads then i can sprites...
1. Going under tileset indexed.. and finding some cliff side pieces does work...i can't walk through them...
then placing a single row of tree doodads over them.
2. Making small, skinny cliffs isometricly, and placing trees doodads over them also works...
3. Lastly I find that making a row of tree doodads, with any terrain works.. but they have to be placed a certain way...
A vertical row of trees must be placed.. starting at the bottom and working up placing them to the top... then they are walk through proof.. my civ goes around...
but a vertical row of trees placed starting at the top and going down.. makes them all walkable...
so i just have to remember to build south to north with my trees...
same with a diagonal row of trees...
None.