[žalost (old)]

WORKS:

textures/hayame/slickcush
{
qer_trans .5  // trans in radiant
qer_editorimage textures/hayame/slickcush.tga  // editor image, be sure to make one
surfaceparm nodraw  // doesn't draw in-game
surfaceparm nodamage // cusion the landing, use nodamage instead of cushion for use with other surfacesparms of that nature
surfaceparm slick // make the surface slick
}