Historically speaking, the original Mini disintegration involved an in-house Camera Mapping tool which we are still using internally, but we could not release to the public. So I had to come up with workarounds for the general public. The first one used Box #3 or alternatively Script operators. But these required either a 3rd party plugin that costs as much as Krakatoa or scripting knowledge, so when I was asked to write a Train Up tutorials for Studio Monthly, I figured it would be possible to use the 3ds Max Per-Pixel Camera Map. I had just used that Map to tweak the look of the final Kame-hame-ha explosion (originally created by CGTalk’s very own Magicm aka Martijn Van Herk) for Dragonball:Evolution and it turned out to work interactively in the viewport when applied to a PRT Loader, which was a nice surprise. (For the record, DB:E is not the worst movie I have ever worked on. I have an Uwe Boll title on my list ;))
So this version is Max+Krakatoa only without the need for any other plugins. I know the camera mapping technique is being used at Frantic on some other movies right now, so it is a general practice for blowing stuff up into dust…