Denoising on alpha texture.

Hi guys,

Do you know maybe how to improve this render? I use (in this case) 16 samples and denoising - In final I’ll use 32 or 64 . My problem is that after denoising alpha textures (leaves) have wierd look (left side of image). Also I would want to know how can I improve look of water (There is {max 4, low 0} light bounces ).

Thanks for any help,