Sprite Size and required space

are you using pixel rounding to "on" ?

if yes that is your problem since spriter tweens sub pixel and pixel rounding only in integer

Spriter author wrote (somewhere at this forum) that they are planing to implement integer-pixel animations someday.. But at the moment it's only works with sub pixel enabled. It looks smoother this way, anyhow.

problem solved.

i set pixel rounding to off and now the animation is fine.

pixel rounding have any impact on performance?

thank you!