Hello thank you !
Yes yesterday I converted this model to Onnx and it works pretty fast Real Time.
Yes this model will work very good on sky images. - You will need a lot of training data, but I don’t think it’s as much as I do, because the sky doesn’t have as many forms as roads. I think 500 images, cloudy/clear sky/mix will be enough.
I am using RTX 3060 12GB and it took at least 12 hours for good results.