(rand-reseed seed)
  seed: an int
  returns #n
F

Restarts the random number generator from a fixed seed.

When a program calls (rand-reseed) with a particular value, and then generates random numbers using a particular sequence of standard-library calls, it will produce the same results every time.

When a Runtime is created, its initial random seed is based on the system clock.

rand-weighted
smoothstep