If you look closely at the content of that top, you will see that it uses a tranparancy map.

You could alter "paint" the transparancy map to make it render shorter and shorter and shorter.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!