There are some programs that allow for exporting STL CAD files used in 3D printing as simple PNG images - in so called slices. What this does, is basically slice the 3D model of the part and save each slice as a PNG image. Default function in some CAD files, but you can also probably find some 3rd party utilities or scripts designed exactly for this job.
Convert Stereolithography CAD file to Portable Network Graphic.
We have found 3 software records in our database eligible for .stl to .png file format conversion.
Microsoft Windows software - convert stl to png on Windows
A 3D modeling tool, 3D-Coat is the one application that has all the tools you need to take your 3D idea from a block of digital clay all the way to a production ready, fully textured organic or hard surface model.
Convert from stl file
to png file
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned stl to png. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A popular 3D animation software, 3ds Max (previously known as 3D Studio Max) is used by professional to create stunning 3D content. It contains modeling capabilities, flexible plug-in architecture, scripting language, etc. It is mostly used by computer game developers. It is also used to create movie visual effects. 3ds Max is only for Microsoft Windows.
A software suite used for 3D CAD/DCC + Animation/Model/NURBS/Skinning translation, optimization and viewing.