When comparing Paint3D vs BDcraft Cubik, the Slant community recommends Paint3D for most people. In the question“What are the best voxel editors?” Paint3D is ranked 9th while BDcraft Cubik is ranked 16th. The most important reason people chose Paint3D is:
Has a free trial version and a cheap full version.
Question Ranking
Pros
Pro Affordable
Has a free trial version and a cheap full version.
Pro Scripting support
Can be used to generate models, import stuff, animate, etc.
Pro Can export traditional 3D models
Pro Interoperates with 2D paint programs
Pro Supports multiple voxel formats
Pro Easy to use
Pro Uses 32-bit color with real volumetric transparency
Pro Supports both "per voxel" drawing and smooth "sculpting"
Pro Very easy to use
You can master the software in less than several minutes.
Pro Not limited to voxels
Any cube can be resized, moved and rotated.
Pro Affordable
Cubik has a free Lite version and a cheap Pro version with many features.
Cons
Con The web site's domain is no longer available
Using the WayBackMachine to get the site's contact email address, I attempted to contact the developer to find out what the story is. There has been no response. The WayBackMachine's last archive date for the site was 11Jan2016. Their cached version of the paint3D.net's forum does not have any post explaining what happened.