the Alberto says works for me
set up 31 frames copy 1 to 31 let the 3d package tween say 28 to 31 nail down a keyframe at 30 blitz wont need to tween between 30 and 1 coz you already did it, its a perfect cycle
save out, then just extract 1 to 30
set up 31 frames copy 1 to 31 let the 3d package tween say 28 to 31 nail down a keyframe at 30 blitz wont need to tween between 30 and 1 coz you already did it, its a perfect cycle
save out, then just extract 1 to 30