Short answer: Yes. Don't make it so big.
Long answer: Create a 30x30x30 skybox, and set it to always be drawn first with EntityOrder.
Why not create it smaller? You may ask.
I found that with small skyboxes, the seams between the six surfaces were visible if the box was created too small. Creating a small box then scaling up did not solve the problem. The only solution was to create the box slightly bigger in the first place.
Long answer: Create a 30x30x30 skybox, and set it to always be drawn first with EntityOrder.
Why not create it smaller? You may ask.
I found that with small skyboxes, the seams between the six surfaces were visible if the box was created too small. Creating a small box then scaling up did not solve the problem. The only solution was to create the box slightly bigger in the first place.