You could wrap Pov-ray (here using POSIX and the Windows build). PHP example:
<?php
chdir("/tmp");
@unlink("demo.png");
system("~janus/.wine/drive_c/POV-Ray-v3.7-RC6/bin/pvengine-sse2.exe /render demo.pov /exit");
header("Content-type: image/png");
fpassthru($f = fopen("demo.png","r"));
fclose($f);
?>
demo.pov available here.
You could use a templating language like Jinja2 to insert your own camera coordinates.
