snow pulse and twinkle don't seem to work

[Birdheezy]

Here is my config file:
{ "mode": "ws281x", "gpio_pin": 18, "pixel_count": 50, "spi_port": 0, "spi_device": 0, "metar_station_inactive_minutes": 180, "airports_file": "../data/airports.json", "blink_old_stations": false, "night_lights": true, "night_populated_yellow": false, "snow_pulse": false, "snow_twinkle": true, "night_category_proportion": 0.1, "brightness_proportion": 0.6, "visualizer": 0 }

I've tried the snow pulse and twinkle and neither seem to be working.

side note, is there a way to fade the led for high wind? it's distracting to have it blink vs fade. or have it blink once every 15 seconds instead of every 2? thanks!