Did you try using sync mask?
Quote: "
SYNC MASK
This command will set the engine to ignore certain cameras, thus saving performance when the cameras are not needed. The parameter is a DWORD mask, which by default is set to 0xFFFFFFFF. You can adjust this mask to filter out the cameras you do not wish to render. Camera zero is represented in bit 1, camera one in bit 2, and so on. A bit state of zero means the camera will not be rendered, and a bit state of 1 means the camera will be rendered, as is the default behaviour.
Syntax
SYNC MASK DWORD Mask Value
"
should turn camera 0 off (and all other cameras)
should turn them back on
F.Y.I.
I haven't used it much but I found to explanations of sync mask command parameters; one being in binary the other in hex. So try playing around with it. In Binary the last bit should control camera 0, the second to last camera 1 etc... so to enable camera 3 and 0...
or if the help is correct
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