Solved! Problem was my sky color wasn't transparent... I had a feeling setting a negative layer number would be it but it kept disapearing... Because of sky color.

Code:
ENTITY* skycubepic =
{
  layer = -1;	
  x = 100;
  y = 0;
  z = 0;
  type = "cosmo_f02+6.bmp"; // SET BY USER
  flags2 = SKY | SHOW ;



Code:
function main()
{
   ...
   vec_set(sky_color.blue,vector(0,0,0));
   ...
}



Decessus - 80% done. 100% abandoned.
GET MY ANDROID GAME! https://play.google.com/store/apps/details?id=com.lasertrain.zspinballfree&hl=en