nix run nixpkgs#imagemagick -- convert envmap_interstellar/interstellar_ft.tga envmap_interstellar/interstellar_bk.tga envmap_interstellar/interstellar_up.tga envmap_interstellar/interstellar_dn.tga envmap_interstellar/interstellar_rt.tga envmap_interstellar/interstellar_lf.tga -append ../assets/skybox.png