These pictures show the chilling cache of homemade explosives that Colorado movie-theater shooter James Holmes used to booby trap his home before embarking on his murderous rampage.

Holmes, 27, who opened fire during a midnight screening of “The Dark Knight Rises,” on July 20, 2012, rigged the bombs and incendiary devices to detonate as soon as someone entered.

The madman, who killed 12 people and wounded 70, was sentenced last month to life in prison for the slaughter. Authorities in Colorado decided to release the video and photos for the first time today.

The images, some captured by a remote-controlled robot, show about 20 black spherical bombs tied with fuse wires — looking like something out of a Looney Toons cartoon.

There also are pickle jars layered with thermite – a metallic mixture that sets off high-temperature reactions – and filled with napalm and bullets that would have been set off by heat.

Nearly a dozen gasoline-filled soda bottles and gunpowder are seen on the floor.

Photos in the apartment footage, taken a day after the massacre by a roving robot, show the explosives and cocktail of accelerants littering the floor and on chairs. A tangle of wires and coils connected the various devices, which were defused remotely.

Holmes rigged a trap with a trip-wire that connected the front door to a glycerin-filled storage container balancing on a frying pan filled with potassium permanganate – a conflagration waiting to happen.

Holmes also also set up a recording that played loud music music — hoping to lure someone to open the door and set off a blast, Richard Orman, a senior deputy district attorney for the 18th Judicial District of Colorado, told ABC News.

He also set up a device by a trash container outside next to a remote-control toy car.

“We believe he hoped someone would hear the boom box, try to play with the car and use a remote control that would actually blow the whole place up,” Orman said. All the devices were rendered harmless using a robot from the Adams County bomb squad.

Authorities also released pictures showing the inside the Century 16 theater – where popcorn and other snacks were scattered on blood-stained seats.

Some of the seats are riddled with bullet holes, alongside the markers placed by investigators to show where the rounds hit.

Another photo shows an AR-15 military assault rife – with magazine inserted – lying next to a theater door, near a blood-splattered pink sandal.