We do not have current plans to implement a distributed rendering approach. You can manually create multiple slightly overlapping crop zones for really heavy renders, or your render manager may support such functions more automatically. You can also use render farms like PixelPlow which have systems that can distribute higher resolution renders across multiple systems and stitch the end results.
Without knowing your hardware (and settings) it's hard to know if 13h is longer than normal for this render, but it does sound a bit long to me. We are always happy to take a look at projects for possible optimization of render settings, and to make recommendations for that. You can send files privately for this to support AT
planetside.co.uk if desired.
- Oshyan