1* Expressions are not supported. 2* Text is not supported. 3* If you have an Illustrator layer, convert it to a shape layer or else it will be exported as a 4bitmap. 5* The smaller the content in a masked or matted layer is, the better the performance will be. 6* Opacity is applied to individual elements not entire layers/groups. This can affect the 7appearance of overlapping items when the group or layer has opacity.