billboard

Cards that face the camera, for any surface shader: zero_billboard(c) turns an instance drawn with a flat mesh in its local XY plane toward the camera around its own origin and at its own scale, zero_billboard_axis(c, axis) turns it about a fixed world axis, and zero_billboard_streak(c) turns it about the instance's own Y axis — rotate an element so +Y points along its velocity and stretch its Y scale by its speed, and it draws as a streak along its motion. Call any of them from vertex_clip.

#include "@builtin::shaderModules.billboard"

fn vertex_clip(c: ClipVertex) -> ClipVertex {
    return zero_billboard(c);
}