He gave me the same worthwhile advice when I had a similar question.
FYI, I did't modify the shape of the crease, only the fill texture. I used the modified shape from The Sauce, who used the modified shape from someone else, etc. You might be able to fast-forward your process, if you open up some ROMs that have the crease you like, and compare tiles between them.
If you haven't already found the crease in my ROM in TileMol, here are the co-ordinates I used for modifying the crease texture:
<bookmark offset="357668" columns="9" rows="9" blockwidth="9" blockheight="9" rowinterleaved="false" sizeblocktocanvas="true" mode="1D" palIndex="0" codec="LN04">
<description>Arena - Crease 1</description>
</bookmark>
<bookmark offset="746922" columns="9" rows="8" blockwidth="9" blockheight="8" rowinterleaved="false" sizeblocktocanvas="true" mode="1D" palIndex="0" codec="LN04">
<description>Arena - Crease 2</description>
</bookmark>
The rest of the related tiles should be very close to that point. I've literally never even played '95 for the Sega, but If you're lucky, the structure in '95 will be similar enough to that you will be able to see what bits you want to mod by comparing them.
All that being said, if you want to draw the crease your own way, creating a map of how those tiles are laid with Kingpin's trick out will seriously save your sanity. Furthermore, you can then use that map to go work in other more intuitive software if like. For me personally, I found that this was much more efficient to work on the whole image in Photoshop, then using the aforementioned map to figure out how it needs to be sliced and diced and exported into TileMol.