New to the group so please let me know if I am not asking / formatting correctly.
So I have just started 3D resin printing with my new Elegoo Saturn. I have printed a couple of free STL files with no problem. I drew up a part for my modeling project with SketchUp maker. Exported the STL file into Chitubox and made a test print after slicing the file. The bottom layer(s) do not seem to print ... the bottom plate should be 4 mm but always prints at 2-3 mm. This makes my clearance groves almost disappear. What should be thru holes have a small layer closing the hole. The bottom layer seems to be "smashed out ... not a clean edge.
I have read, watched, studied lots of "help" on the web, make several slow changes to bottom layer print times, adjustments to lift / rest / etc, and lots more test prints which all have failed.
!https://photos.google.com/photo/AF1QipOmEUZEJBOPGYu-YkAYb_t-BcOOXoCIQvSxde_q !https://photos.google.com/photo/AF1QipPiv_x4FqB_MEB0bL8sfw4SAayPtFtOIBGi59kc
!https://photos.google.com/photo/AF1QipOay6TRohL-ZI1igAzcg7BTVok-h8EA7-spwbHE
!https://photos.google.com/photo/AF1QipMq1i9Vu1f6oPmcsVSlUrcP4ao0UyhBzoGhga7H
!https://photos.google.com/photo/AF1QipNVMMBjZFV9tR58Qyy3kUXFLMCl3VV4mg9OViAs
!https://photos.google.com/photo/AF1QipO1ka0ue6Nv_Z2SQRC708s-4wj83JK8eWU89dWx