ITSP (ImageToSTL Project)

The ITSP file format is a 3D file format used to store simple 2D image data in a way that allows it to be represented in 3D space through the use of extrusion. The format is the native format of the ImageToSTL 3D Model Designer application and was devised as a means to allow users with basic knowledge of 2D bitmap drawing and editing software to create complex 3D objects suitable for 3D printing.

An ITSP file consists of a main data file containing the position, rotation, and scale of a 2D object that is to be projected into 3D space. The objects are arranged into layers, with each layer being assigned a depth, allowing 3D objects to be created. Along with the data file are PNG image files of each element, and all these files are packed into a ZIP container with the ITSP file extension.