Feature request: Paint mode

[Akira1San]

Add a build in painting mode. Such as having a library, selecting mesh and use a brush to paint on the editor instead of constantly use shortcuts to duplicate. Example -> https://www.youtube.com/watch?v=i8a00XRGgqU

[ghost]

+1 for that

[ypflanzer]

Should be easy to implement: Cast a ray in the direction the camera is looking at and either use an abstract plane to place new objects or other objects that already exist in the scene. Should be implemented in C++, see #250 for that.