hi everyone, im on a project for printing now and they demand a file that must have enough resoluion for printing. but the BPR render can only have 72 ppi. is there any wya to increase this resolution? even if i tried go to photoshop and increase it the image still keep the broken edge 
See the Image Resolution section on this page:
http://docs.pixologic.com/user-guide/materials-lights-rendering/rendering/
well not really the best way but you can just go in Photoshop>Image size>change the resolution first and then the dimensions for the image.