Bah, I swear, skies are always a pain. I get a HOM effect with the following shader. The props_skyportal is closest to the top left corner of my box, and is more than 2000 units away in all three dimentions. Here’s the shader:
textures/islands/islands_skybox
{
qer_editorimage textures/islands/ocean.jpg
surfaceParm noimpact
surfaceParm nolightmap
surfaceParm sky
surfaceParm nopicmip
surfaceParm nomipmaps
surfaceParm nodlight
q3map_sun 0.90 0.95 1.00 125 270 20
q3map_skylight 50 3
q3map_lightmapFilterRadius 0 8
skyparms textures/islands/env/ocean/ocean 512 -
}
The skybox images are in textures/islands/env/ocean and are named correctly.