Make sure to AC_CHECK_HEADERS after CC and CPP are defined.
Use autoconf 2.52.  2.13 doesn't guess CC correctly on mingw32.

and also seem to require an additional file, config.sub.
Who needs em.

attributes 0 1 2 ...  even though they aren't stored that way.

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.