#9884·carla

Sky colour flickers at low sun altitudes when driven via the Weather API

Author: AperissCreated Sep 15, 2026Updated Sep 17, 2026

Setup

  • CARLA version: ue58-dev @ 5684efc31 with #9883 applied
  • Platform: Ubuntu 24.04.4 LTS
  • Python version: 3.12.13
  • GPU: NVIDIA GeForce RTX 3090
  • GPU Drivers: 580.173.02
  • Map: Town10HD_Opt

Describe the bug Driving the sun through the weather API makes the sky colour flicker, at low sun altitudes.

Steps to reproduce Rotate the sun through carla.WeatherParameters at a low altitude on Town10HD_Opt.

Expected behavior Sun movement should produce a continuous change in sky colour.

Logs

Scripts import time import carla

world = carla.Client('localhost', 2000).get_world() weather = world.get_weather() weather.sun_altitude_angle = 2.0

while True: weather.sun_azimuth_angle = (weather.sun_azimuth_angle + 0.5) % 360.0 world.set_weather(weather) time.sleep(0.1)

Screenshots

Image

Additional context