LSL:PrimitiveParams
From OpenSimulator
Here's some data to give you an idea of how 'taper' converts into PathScale for a 'box'
||| SL Client Edit UI Value| LSL PrimitiveParams top_size | PathScale | -1 2 0 -0,75 1,75 25 -0,25 1,25 0 1 100 0,75 0,25 175 1 0 200 |||