3D reconstruction videos reveal sniper positions during siege stand-off

Grim details of what happened during the Sydney siege have emerged, with the release of videos showing sniper positions, the location of gunman Man Haron Monis and the killing of Lindt cafe manager Tori Johnson.

In the confronting reconstruction, made using state-of-the-art imaging technology, NSW police produced a number of 3D "fly-through" videos showing a basic scene, sniper positions at nearby buildings, forensic ballistic evidence, and the location of several hostages and Monis.

The siege ramped to its deadly conclusion at 2.13am on December 16, 2014, after Monis murdered Mr Johnson, prompting tactical officers to storm the Martin Place cafe where hostage Katrina Dawson was also killed after she was struck by fragments from police bullets.

Using laser scanners, NSW Police crime scene officer Dominic Raneri was able to accurately recreate the scene inside and outside the cafe to within a millimetre.

The fly-through video begins with an aerial view above the Sydney CBD, then descends to ground level to show the streetscape around the cafe, including the vehicles there on the day.

A second fly-through shows the three positions where snipers were located however many details were blacked out before the videos were released.

The inquest continues before NSW coroner Michael Barnes.