Leurnid wrote...
I'm sorry, I wasn't very clear, and/or I don't understand how the tile models work
The elevation stair model in that set, tni02_x01_01, can only be placed adjacent to a regular corridor tile from the original tileset. The geometry of the tile would allow for tni02_x01_01 to be placed next to itself (either as a double ascent or an up-and-down), but currently, the toolset is not allowing such a placement.
Is that because of hooks embedded in the model, or is that a setting in another document?
Tiles for NWN require a specific set of options.
1) 10x10 meters in size for each tile. You can make a tile that "appears" smaller by blacking out sections, corridors do that with high walls and black surfaces up top, BUT the actual tile itself is still 10x10 meters in size, just wasting the black surface space for non use.
2) Each tile MUST define what tiles connect to it at the four corners, and if connecting to a crosser (your corridor is actually a crosser) must also define what crosser is connected to the middle of each side.
So, by default, what you are attempting to do can NOT be done without creating NEW tiles as was mentioned above. TO do that, you would have to create a set of elevation stairs that connects either to flat floor on top/bottom OR, narrow the stairs down so you could create two, side by side, that connects to the corridor using the normal settings. Either way, you MUST create new tiles.
Now of course you still have to edit the .set file to create the option of using any new tile you need, so yes, you still edit the .set, but just editing the .set without making the tiles will not help you.