Pesky tree problem

[Xobim]

Hello everyone! I've got myself into some trouble with the jungle tileset. I'm making a level which should resemble a forest. Thus, loads of trees. The only problem is that all the tree tiles in the tileset are masked, so Jazz keeps bumping into them when testing the level. I want the level to be full of trees, but I don't want all of them to obstruct the players path.
I've placed trees on the 3rd and 5th layer of the level, but that results in tilebugs:
<img src=http://img140.imageshack.us/img140/542/layers2ln4.jpg>
The tree on layer 3 gives tilebugs which cannot be solved. The tree on layer 5 dissappears behind the ground. It looks kinda weird, and when jazz stands on a branch, the tree seems to be placed on both layers.
<img src=http://img140.imageshack.us/img140/1092/layers1pv0.jpg>
This is the way I solved it, but I'm not satisfied with this solution.

My question is: does anybody have an idea on how to make those trees be placed on the foreground and background without tilebugs? Or does anybody know a good example level for the jungle tileset?

Thanks in advance! :)

[Pako]

Have you tried to place the bottom of the tree and branches in layer 4 and the rest in layer 5?

[Xobim]

The branches are already placed in layer 4. Placing the roots in layer 4 makes the tree look very unrealistic with jazz standing on top of it and the rest of the trunk behind him. Besides that, jazz would still bump into the roots of the tree...

[Stijn]

I'm afraid the only solution is to edit the tileset.

[Raven aka StL]

That is correct.
No one usually cares about characters going behind the ground part of the 'tree base' tiles when they're in the foreground. It's just unsolvable.
Of course, it would be mighty convenient if 'tree base' tiles without ground were provided as well.

[DoubleGJ]

This is actually minimally visible when playing.
You could TRY using slopes or maybe even float up to avoid player from being in the point where this is visible. Even put invisible masked tiles (I recall there are such in Jungle as I used them for sure). But really, this is just being bery in-depth. Most players won't care about this minor setback.

[Xobim]

The invisible tile idea was one I though up too. Put the tree trunk in layer 5, and remove the ground tiles that obstruct the image of the trunk. Then use the invisible tiles to make sure Jazz can walk over it. Problem is that the ground is made up of two tiles.
I guess this is the best solution ATM.

Thanks everyone! :)