What file requirements do lenticular posters have?

For lenticular posters, each image file must be at least 300 DPI with 0.125" bleed all the way around. A multi-flip design needs one separate file per image, one for each movement angle.

Flatten each frame before submitting so the interlacing lines up cleanly.

Keep every frame at the same dimensions and resolution. The frames are interlaced during production, so the sharper each source image, the crisper the final effect.