New to 3D printing ( resin help ) small models looks fine, bigger models are ugly

Hi


I got my first 3D printer a couple of days ago ( anycubic photon ) and have been printing some smaller models for testing without any problems.


Now I am trying to print some bigger models which results in the first couple of layers ( not the bottom layer ) getting an "island stepping" effect.
Is this due to, weight problem ( not hollow enough ), room being too hot, bottom layer timing or maybe normal layer timing in general?


Would really appreciate if some one could help :)


Test print 1/3 size - No problem
https://i.imgur.com/Ia6sQnA.jpg










1/1 size print - Ugly print
https://i.imgur.com/epVZfCO.jpg




https://i.imgur.com/iPrpjKV.jpg