thanks for the quick reply, zwerkules.
here's an excerpt of the zkw01_edge.2da from the hak :
Corner1 Edge Corner2 Height Model
0 SwampWater **** SwampWater 0 ZKW01_Z01_01
1 SwampWater **** SwampGround 0 ZKW01_Z02_01
2 SwampGround **** SwampGround 0 ZKW01_Z03_01
3 SwampWater **** **** 0 ZKW01_Z01_01
4 SwampGround **** **** 0 ZKW01_Z03_01
5 SwampWater Bridge SwampWater 0 ZKW01_Z04_01
6 SwampPit **** SwampWater 0 ZKW01_Z06_01
7 SwampPit **** SwampPit 0 ZKW01_Z05_01
8 SwampPit **** **** 0 ZKW01_Z05_01
9 SwampGround Wall SwampGround 0 ZKW01_Z07_01
if i understand what you're saying, then the problem would be with either line 2, 4, or 9 -- is that right ?
i've verified that the models referred to in the 2da exist in the hak. ZKW01_Z03_01 looks like this :
...and ZKW01_Z07_01 looks like this :
the corner tile causing the problems in the upper left of the screen shot above is called 'zkw01_e05_02', and looks like this :
it has no nodes and no animations.
i've read through the bioware tileset guide a couple times, and from what i understand, the edge specification for the upper left corner would be line 4 ("SwampGround **** ****"). i created a new tile from zkw01_e05_02 above, naming it 'zkw01_z09_01' and added an additional line to zkw01_edge.2da referring to the new tile, but it didn't solve the problem, so obviously i'm missing something. any idea what ?