o. k. thank you. The numbers 350/350 were only a test. I have massive problems with a little part of a pool you can see in the right side of the camera. I changed the settings since 2 weeks ( render settings).
The pic looks very good I think, but the little oart of the pool. I increased the eye- light depth to 1000 and the bounces to 25. When I increase the bounces the reflections are better in the pool but not in the window of the house you know. When I reduce the eye- light depth lower than 256/256, the water of the pool looks not very realistic. When I increase the settings about 512 and bounces 25, the reflections are to transparent in the window of the house. I think it is the angel of the camera relative to the pool.
I have the scene modeled by a photography and I dont want to change the angel of the camera. Not in principle.
I have a pic for example. Settings - 256/256 and bounces 16. Ca 400 s/p after 9 hours!!
Although the pool is only a marginal phenomenon, but it is a part of the whole