3d Objects

[SourceChild]

I think edge blending would be cleaner...
...my designer has done a test shoot...afraid of loosing intensity by having to spread each of the projectors...

Trust me on this, if you can blend, even a little bit, it will look so much better. With even the slightest overlap of two butted edges, your intensity increases and it is very noticeable.

...3 projectors tiled (not blended) shooting onto a single arc...
...120' long...

Something of a concern, you mention 120'. That would mean a single projected image size of 30'x40'.
I am not sure what projectors you are using but that is a huge image.

I typically use LX-100 10k projectors and the largest size I would ever shoot is 18'x24' and that is in low light. Even if you are using a 20k projector, 30x40 is still huge and will only be about a tenth as bright as a typical screen.

If you're worried about running everything off of a single Catalyst, remember you can use 2 TH2Gs and run 5 projectors and put your HUD on one of the six outputs.

I have some intensity equations if you're interested.

[litemover]

Catalyst Blending works great, even at high Def.

If you need it to look better, work with the projectionist to do a dual blend between the projectors and Catalyst simultaneously, set a blend of around 20 to 35%, leave up the alignment marks then let the projectionist work out the rest of it.

If you are working in an extreme situation with a rediculous amount of souces that need to blended, composited, PIP, pixel adds, etc..., and don't want any hastles, USE A SPYDER and don't cheap out.

You can see everything that a Spyder does here: Vistasystems

For most cases though, Cat edge blending and a combination of projectionist will/knowledge will go a long way so treat your projectionist with class.

CC

[SourceChild]

work with the projectionist to do a dual blend between the projectors and Catalyst simultaneously...

What do you mean by this, "Dual blend between the projectors and Catalyst?"

You can see everything that a Spyder does here: Vistasystems

What are the costs of the different Spyders and are they worth it?

[joshgubler]

Thanks for your concerns, SourceChild.

We did the show back in Sept. It went really well. I'm pretty sure the projectors were 21k. Plenty bright for the live audience, but a little dim on camera. It would have been nice to have them doubled stacked.

As I mentioned earlier, our projection screen was actually a white scrim curtain with fullness. Because of that, the edges were undetectable. Seriously, I had trouble finding them sometimes...and I knew they were there!

As far as alignment goes...catalyst's "curved screen test" works great. I just had the projectionist center each projector and fill the screen with the excess shooting beyond the screen. Then I tweaked the control points until everything lined up. Piece of cake.