What are some alternatives?
When comparing PaintCube and Cinema 4D, you can also consider the following products
Substance Painter - Substance Painter is a 3D painting software allowing you to texture, render and share your work.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Keyshot - KeyShot 3D rendering and animation software is the fastest, easiest way to create amazing, photographic visuals of your 3D models. Enter your search in the box aboveTryYour download of KeyShot is only moments away.
Mari - Mari is 3D painting without limits, combining the power and performance to handle even the most complex assets with artist-friendly 3D paint tools.
ZBrush - ZBrush is a digital sculpting and painting software solution.
Sculptura - 3D sculpting for everyone