What are some alternatives?
When comparing PaintCube and Keyshot, 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.
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.
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.
V-Ray - Learn why V-Ray for 3ds Max’s powerful CPU & GPU renderer is the industry standard for artists & designers in architecture, games, VFX, VR, and more.
Sculptura - 3D sculpting for everyone