Hi, I'm roninseito, creator of the "seamless" animated background themes on themezer. Eventually I will post a how-to on animated bg nxthemes, building on zzzribas patterns tutorial. It will cover tiling the base bg, and how to use the rdtbase_changeuserin/out animations to keep it looping (instead of rdtbase_enter, etc.). It will also cover making custom applet icons in paint.net, and using them as sprites or masks in the bg animation. It will explain the undocumented blend values for keyframes, so you can translate objects at a constant speed in loops, or do circles and sine curves. Blend is the instantaneous pixels per frame of the object at that keyframe. It will also cover the method of masking and moving the background to make a sprite sheet appear as an animation. Ps I just got a 2nd switch to run 22.1.0 so now I can keep seamless up-to-date 
Last edited by RoninSeito,
