MagicaVoxel
A free voxel editor and renderer with palettes, layers, transforms, materials, and path-traced previews.
Why use it
Its low learning curve and cohesive look fit jams, isometric games, and low-cost 3D production.
Where it fits
Use art, animation, audio, levels, and narrative to make the game easy to read and its world convincing.
What to check
Voxel meshes and transparent materials can become expensive at runtime; merge, simplify, and verify coordinates before engine import.