Just a little suggestion!

It would be really cool (i don't know if it is possible to program) a little preview mode before rendering like on blender. So we will be able to better control the parameters of the final picture...

I cannot really reproduce the live rendering mode from Blender however what I generally do is to use the percentage field. If set to 50%, height and width are divided by 2 (and render time divided by 4). You can also but a smaller number in samples like 30. That will create a small and quick preview render that shall cost maybe even less than 1c.

Thanks for the answer!
I will do that now, thanks for the suggestion

See this guide that I wrote today for more information: https://www.mecabricks.com/en/forum/topic/869

Great