When comparing Paint3D vs SLAB6, the Slant community recommends Paint3D for most people. In the question“What are the best voxel editors?” Paint3D is ranked 4th while SLAB6 is ranked 19th. The most important reason people chose Paint3D is:
Has a free trial version and a cheap full version.
Specs
Ranked in these QuestionsQuestion 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 idTech1 and Build engine voxel editor
While the idTech engine 1 (aka the "DooM Engine") does not support voxels, newer limit-breaking source ports have added the ability to render the .kvx voxel format designed for the Build Engine. Slab6 is currently the only well-known .kvx editor as it continues to pop up in DooM modding forums and tutorials. Even though it's not the most user-friendly editor, its support for .vox export enables the model to be edited in MagicaVoxel or voxels made in MagicaVoxel (which supports Slab6 (Slab) .vox export) to be converted to .kvx for use in-game.
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.
Con Not very user friendly
If I asked most people to use this to draw something without reading anything about the program, a good percent would not be able to. with odd controls like 'Insert' to draw, 'L' to open, and no customization on these controls, its requires users to read how to use it. the help guide only gives you a basic understanding of how things work and requires you to search through files in order to fully understand how powerful this tool really is. If i were to rate this for how user friendly it is on a 1 -10 scale (with 1 being like binary switch panels, 3 being ms-dos, 5 being a minimal gui with a complex console command line for all functions, 8 being able to sit down and perform basic operations, and ten being no effort at all,) I would give this a 7(has a gui that is easier to navigate but even simple functions require a bit of reading).