learngrow: smoothed remaining choppy curves

[neverball] / data / ball / basic-ball / basic-ball-solid.map

{
"classname" "worldspawn"
"drawback" "1"
"depthmask" "1"
}
{
"classname" "misc_model"
"material" "ball/basic-ball/basic-ball"
"model" "ball/basic-ball/basic-ball.obj"
}