Autodesk has released an update to MeshMixer that allows users to mix and mash-up models from the 123D App family. Users of 123D Design, 123D Catch, 123D Make or 123D Sculpt+ can upload their models to the 123D Gallery. The files can then be accessed through MeshMixer where designers can merge models into unified meshes, repair them, and export them for 3D printed output. By connecting the 123D family together with 123D Gallery and MeshMixer, Autodesk's goal is to invite more individuals into the 3D design process, allowing them to create with more complexity and achieve greater variety.

MeshMixer could be considered one of Autodesk's work horses for validating meshes before they are 3D printed. The 3D print export function in MeshMixer will repair any of the models in the 123D apps. It can also preview the digital model on a variety of 3D printer brands such as Stratasys, Makerbot, Type A Machines, the Dremel 3D Idea Builder and Autodesk's own Ember. Users can use MeshMixer to automate the process of creating supports and scale their models to ensure the most efficient fit on the 3D printer's build plate.

While MeshMixer and the other 123D apps are free, in order for designers to make their files commercially available for sale, they must sign up for a premium account costing $9.99 per month. This is due to a change in Autodesk's software licensing agreement for the 123D apps. However, there is one exception – users can sell their 3D models without a premium account subscription if they upload them directly to the 123D Gallery.