#2, by afrlmeWednesday, 16. August 2017, 12:13 8 years ago
I don't think there's a maximum number. Though until recently animations with more frames than x couldn't access all of the frames. I believe Simon fixed that in the last update.
For optimization purposes I recommend using the least amount of frames you can. In other words (no duplication frames, as they are a waste of system resources). If you have multiple frames in a row that are exactly the same, then delete them so only 1 remains & set a custom delay/pause value on the remaining frame so that it plays that frame longer than the global delay/pause value you set in the properties section for your animation.
As for walking in general. I don't think you should need more than 32 frames for a very smooth looking walk animation. 14-24 frames is the typical norm for a 2D walk animation (well from the older point & click games; monkey island 3 for example being 14 frames). You can simulate smoothness by tweaking the global delay/pause value for each of your animations - if you get that right, then you can make almost any animation, regardless of the amount of frames it has look pretty smooth. You have to remember that this is a game with many different animations & moving parts. It's not something you will be exporting out as a single video, so optimization is very important otherwise people will have trouble trying to play your game because 2D animation is very demanding of system resources; especially if the game is full HD (1080p) or higher.