render_wallpaper.py drives headless Firefox frame by frame (four at a time,
resuming where it stopped), then ffmpeg. Thirty seconds at 30 fps is exactly
one plasma cycle, so frame 900 meets frame 0 and the loop has no seam.
plasma-plugin/dev.emil.video is a minimal Plasma 6 video wallpaper: one file
per screen, filling the screen, looping. H.264 is encoded Baseline because
Qt here decodes through openh264, which rejects High profile and leaves a
frozen frame; a new source also has to be played explicitly.
The #shot hash learned info=0 to hide the on-screen hint for renders.
Pass 1 draws one raymarched gem on sheet 1 instead of plasma; its alpha
carries coverage rather than depth, so pass 2 can light it as a solid
while every other sheet still absorbs by path length.
Pass 1 renders eight plasma sheets into an atlas with linear depth in alpha;
pass 2 marches the refracted ray to each sheet and absorbs it by real path
length, so near and far layers separate under pointer parallax. Plasma cycle
repeats exactly every 30 s; - / = change speed.
emil28092005