How does this compare against Unreal Engine 4?
Does the stars emit light or contribute ambient / global / atmospheric illumination?
Does the clouds diffract/scatter light?
What about OpenGL 4.2 support?
Why OpenGL ES support is removed?
Only support for old ActionScript 2.0, not support for the now old 3.0?
How about scripting support for Lua, Ruby, Python, Perl, Tcl?