Zitat:
gluPerspective
The gluPerspective function sets up a perspective projection matrix.
void gluPerspective(
GLdouble fovy,
GLdouble aspect,
GLdouble zNear,
GLdouble zFar
);
Parameters
fovy
The field of view angle, in degrees, in the y-direction.
aspect
The aspect ratio that determines the field of view in the x-direction. The aspect ratio is the ratio of x (width) to y (height).
zNear
The distance from the viewer to the near clipping plane (always positive).
zFar
The distance from the viewer to the far clipping plane (always positive).
Skybox sollte sich
IMHO zusammen mit dem Betrachter bewegen, d.h. die Position des Skyboxes soll immer relativ (gleich) zum Betrachter sein.