Some SPLATS, can be used as a spline, or have identical spline materials which work better. You can use the colorize -> alpha to paint transparency at certain spots along the spline, such as the edge's. By default, the spline will have gradient 0%-100% alpha at the ends, for blending.
That will most likely be the best solution for your question.
-
#Steam AliasWL%Streak
- 1.831222.789+37
- 2.34957.860+14
- 3.589215.733+4
- 4.1098613.642+2
- 5.280162.633+8
- 6.305114.728+1
- 7.916405.693-2
- 8.271108.715+22
- 9.721440.621+3
- 10.1041674.607-2