Hello,
the sky is not visible.
What do I have to do to make it visible??
Code:

---

sky sky_1{ 
type=<sky.mdl>; 
layer=1;
flags=scene,visible; }

---

From what I've read, you need a block with the sky flag checked.

Create a big hollowed block around your level and/or assign a texture witht the sky flag checked, to those blocks/surfaces which should show the sky.

Thanks,

the sky in visible now, but sky.mdl is very small.
How can I make it as big as possible?

This works:
Code:

---

sky cube{ 
type=<sky.mdl>; 
flags=scene,visible; 
scale_x=100;
scale_y=100;
scale_z=100;}

---