Way to freeze flame spread similar to freezing time for ramp input?

[mcgratta]

Discussed in https://github.com/firemodels/fds/discussions/13222

^{Originally posted by bwklein July 25, 2024} I'm looking for a way to freeze the 'spread' of a fire growth that is based on the SPREAD_RATE parameter. Similar to how we can freeze the time value input to a ramp for HRRPUA, is there a way to do this with the input to the spreading function. Essentially, stopping the spread of the fire, but keeping the cells active that are within the spread radius.