Dynamic Elytra

Two vapour trails come off your wingtips while you glide - thin flying straight, thick and bright on a hard bank.

They track the wings as they spread and pitch, and fade out below about 18 blocks a second. Other players and mobs leave them too, and so do fast falls and trident launches - each with its own toggle.

Speed lines, which used to be Slipstream

Slipstream was a separate mod. It is this one now, and an old config/vapor.json gets read once so your settings carry over.

Three styles - crisp streaks, a softer smear, or the screen edges rushing and darkening - in five colours, with a separate strength slider for sprinting, falling, riding, riptide and gliding. They draw over the finished frame, so they survive shaderpacks.

Two caveats

• The trails are unlit, so under a shaderpack they look flat next to the shaded world. The speed lines do not have this problem.
• The shipped colour is white - saturation is 0, so the hue setting does nothing until you raise it.

Client-side, no server install. MIT. NeoForge and Fabric for 1.20.1, 1.21.1 and 26.2. No dependencies. Free to use in modpacks.