mtvtoppm(1) on Linux
The text fc719182ab19, as Debian 13 (Trixie), Debian 12 (Bookworm) shipped it.
convert output from an MTV or PRT ray tracer into a PPM
The text fc719182ab19, as Debian 13 (Trixie), Debian 12 (Bookworm) shipped it.
convert output from an MTV or PRT ray tracer into a PPM