Modifying wave forms on LFO controller rack

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it seems there are only six: sine, triangle, saw, square, moog saw, exponential.
I wish I could draw my own.
tbs I would like a wave like this:


_/\_

(this is upside down of what I want)

Vibed and bitinvader are capable of drawing waves.
So could we put that function into lfo?
Already done.
in 4.15? how?
No, not in 0.4.15. In 0.9.x.
rats!...oh well