I would consider this a visual detriment to animation. Possibly going as far as to consider it a bug.

Hi there! Actually onion skinning is useful when you've to draw the outline of your animation. It's quite hard to use onion skinning for opaque pixel art figures. Anyway I'll leave this issue open and add the extra option to control the order of rendering. But there is another related problem: Previous versions of Aseprite had the behavior you said, but it wasn't useful in most situations, i.e., when the background layer is visible. As you can see, onion skinning is a tricky issue, you have to provide options for all special cases.

Yeah a couple more options for onion skinning for special cases would be excellent. Especially changing the rendering order.

Just as an aside onion skinning for animation is mostly useful at the line art stage.

Thanks for the prompt reply!

I was going to consider posting this issue myself, but makapixel summed it up very nicely so I'll second his notion. The old method of onion skinning (like in v0.9.5) was very easy to use, but the newer method is cluttered and unusable. Please add some options that will allow us to replicate the old onion skinning!

If someone want to give a try to this change before the next release, please contact me at support@aseprite.org and I'll package a special build for you.