AC3D is a 3D design package from Inivis that's been on the go almost 30 years
AC3D is one of the longest established 3D design software programs available today. In development from 1994 and commercially available since 1996, AC3D has grown to become a highly regarded and popular program.
Inivis Limited, developers of 3D design software, purchased the complete rights to AC3D in 2002. Inivis is committed to developing AC3D's functionality and multi-platform availability, whilst maintaining its user-friendly and client-focused reputation.
AC3D is suitable for anyone wishing to visualise their ideas in three dimensions. AC3D is used for a wide variety of purposes including game model creation, product prototypes, virtual reality simulations and data visualisation.
AC3D is the Native file format naming of the AC3D program no doubt it's for the word Dimension as in 3rd Dimension ie 3D
That was my first thought as well, but most of the releases I see are not 3D movies.
Who mentioned 3D Movies ?
AC3D is a 3D design package from Inivis that's been on the go almost 30 years
thanks for all the downvotes 👍
Please read the room, this is very obviously not what I'm looking for.