Hi Icepick ,
Thanks for the advice, I think what I'll probably do is keep to the "reasonably priced" short throw projectors off eBay that have 50% or more of their lamp life left. This will allow me to get a reasonable projector and if I upgrade every 2 to 3 years then hopefully for the same price as the previous one, I can get a more advanced projector with better ANSI lumens and resolution. This would then give me a reason to re-map and to try different techniques and effects.
I have a couple more questions:
1. Projector safety and security
Halloween where I am iis generally wet and windy. How do you keep your projector safe from the elements and also safe from being interfered with (i.e. moved or shaken) by inquisitive ToTs or at worse picked up and stolen?
On YouTube there are some great Halloween projection mapping videos with the house being knocked down at the finale, bricks or sections of house spinning around like shutters or Rubiks Cube. How are these effects achieved? Are they generic so any video editing software will do it or are they specific to individual software? Are there names for effects dos if you watched a particular Halloween projection mapping videos you would say ah, they did x, y, and z effects. Are there any web resources that list describe a load of effects so that us novice mappers, once we have 3D traced our houses, can say right lets do A, B, C, and D to the effects and add such and such extra videos as well?