I've made sure that the transparency is really strong. So, why am I getting this?
My guess: don't use Transparency_Edge - set that and Transparency_Falloff to zero.
If it's not that, attach a screenshot of your material room!
No, it's not, thank you for the suggesting, though.it seems like the guide lines are inserted on the transmap
According to your screenshot, you still have Transparency_Edge set to 1 - set that to 0.000. As @seachnasaigh says, also plug your transmap into Specular_Value to make sure it's zeroed when transparency is maximum.
Wait, can I do that? Since it hasn't been released?