invisi-prim

this is probably the wrong place to post this but i'm looking for how to make invisiprims.
not alpha textures or setting the alpha to 100 but the ones that are see through but don't show whats inside/behind/under.

Here the script. However things have changed since 2006.
You just need to use the on llSetTexture("38b86f85-2575-52a9-a531-23108d8da837", ALL_SIDES); and be done with it.
The refreshing is no longer needed.

// Invisibility Prim Public v1.1b
// by Beatfox Xevious
// last updated Mar. 22, 2006

init()
{
    llSetPrimitiveParams([PRIM_BUMP_SHINY, ALL_SIDES, PRIM_SHINY_NONE, PRIM_BUMP_BRIGHT]);
    llOffsetTexture(0.468, 0.0, ALL_SIDES);
    llScaleTexture(0.0, 0.0, ALL_SIDES);
    llSetAlpha(1.0, ALL_SIDES);
}

refresh()
{
    llSetTexture("38b86f85-2575-52a9-a531-23108d8da837", ALL_SIDES);
    llSleep(30);
    llSetTexture("e97cf410-8e61-7005-ec06-629eba4cd1fb", ALL_SIDES);
}

default
{
    state_entry()
    {
        init();
        llSetTimerEvent(5);
    }
    
    on_rez(integer start_param)
    {
        init();
    }

    timer()
    {
        if ((integer)llGetWallclock() % 60 < 10)
        {
            refresh();
        }
    }
}

Thanks.
sorta worked it hid my avi but not any prims. looks like i'll be using the good old cloak script

You have to add a little alpha (1% is fine) to your prims that you don't want shown.