All opinions about x265 encoder (HEVC) configuration are welcome, but there are a specific thread
High Efficiency Video Coding (HEVC) when you can read about that with experienced users.
Further discussion about that is a little off topic here. Even when r0lZ (and myself) don't use x265 to encode.
BD3D2MK3D can encode and configure x265 in a similar way than x264, please use this thread for specific 3D troubles and the related thread for general configuration.