When comparing Atomic Game Engine vs CopperCube, the Slant community recommends CopperCube for most people. In the question“What are the best 3D game engines?” CopperCube is ranked 15th while Atomic Game Engine is ranked 50th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free and open source
Pro Usage is similar to Unity
You can code in C#, though API is different and workflow in general is similar as well.
Pro Allows creating 3D apps and games without programming
Pro Good 3D editor
Includes easy to use 3D editor for quickly clicking together 3D games.
Pro Native WebGL support
Can create 3D games as real WebGL apps, running inside websites. Doesn't use a cross compiler, so WebGL apps are small and download quickly.
Pro Good terrain editor
CopperCube includes a terrain editor. Terrain can be drawn with height painting tools directly in the editor, textures can be painted quickly with automatic texture blending into the terrain. There are also tools for placing grass and bushes, and for distributing meshes automatically over the terrain.
Pro Exports to irrlicht
It was also written by the founder of irrlicht, although it is not open source.
Pro Available on Steam
CopperCube is available on Steam It was Greenlit.
Pro Easy to learn and to use
Pro Fast prototyping
You can quickly develop an experimental working model of the product (prototype), because the engine gives you access to a lot of prefabs, plugins and settings. And, you can use the visual programming to speed up the process, even if later you have to write code in order to improve the final product.
Pro Oculus Rift support
Supports both DK2 and DK1.
Cons
Con Abandoned
The lead developer now works for Epic on UE4, and no longer maintains or updates this project.