focalpoint feature.
warp in N-to-3D projection mode.
draw points using vertex arrays if available.
lum <var> {abs <base> | lin}

Use warp_invalidate() when conditions change.

Allow dyndata processors to switch themselves off with st->dyn.enabled = -1.

Use HAVE_SQRTF.

Works but no -ref yet.

Add (not yet used) fcolors field to struct mesh.

so results can be used as:
   perl tilesnap ... > something.cf
and then "read something.cf".

to generate images of resolution higher than the display can handle.

Add new SUBSTITUTE warp-type ("-subst field0"), which maps
three successive fields -> XYZ position (time-independent).

in each of the files that uses alloca.

camera's distance to a given (world-coordinate) focal point.