Hi 2btruman,
while this is possible with MT Pro, it is currently somewhat inconvenient: there is no "s-curve" function, and there is no function to draw the mapping curve.
Currently, there are 2 main options: 1) use math and find a formula to describe the curve, or 2) do a cumbersome series of "if incoming_value==X then outgoing_value=Y" statements for every incoming value.
- Using math is somewhat difficult, because there are no logarithmic commands in MT's Rules, and no decimals (aka floating point). It's relatively easy to approximate an s-curve using 3 straight lines, but probably that's not what you want.
- Using a spreadsheet and a text editor with macros, I was able to quickly create an S-curve and create the corresponding series of 128 IF statements for the Rules section.
Click here for the Google Spreadsheet
Attached is the project file.
Florian