[Ghosted]

Originally Posted by KliPPy Yeah, all 4 hulls are constant size. Monster one seems to be mins {-32, -32, -32}, maxs {32, 32, 32}.

I think you talk about TRACE_HULL and not TRACE_MONSTER_HULL
cause monster_hull:
* also requires mins/maxs in arguments
* not requires hull id which is index of vectors (mins/maxs) array like the one you said
this is used on TRACE_HULL:

Spoiler

// default hullmins
static vec3_t cm_hullmins[MAX_MAP_HULLS] =
{
{ -16, -16, -36 },
{ -16, -16, -18 },
{ 0, 0, 0 },
{ -32, -32, -32 },
};

// defualt hullmaxs
static vec3_t cm_hullmaxs[MAX_MAP_HULLS] =
{
{ 16, 16, 36 },
{ 16, 16, 18 },
{ 0, 0, 0 },
{ 32, 32, 32 },
};

plus trace_hull cant explain my version of checking emptiness