CreateCamera()

Let's find out:

Graphics3D 800, 600

GridSize = 10
CameraLimit = GridSize * GridSize
Width = 800 / GridSize
Height = 600 / GridSize
Dim Cam( CameraLimit )
For X = 0 To GridSize - 1
	For Y = 0 To GridSize - 1
		C = C + 1
		Cam( C ) = CreateCamera()
		CameraViewport Cam( C ), Width * X, Height * Y, Width, Height
	Next
Next

Light = CreateLight()

Cube = CreateCube()
PositionEntity Cube, 0, 0, 4

Repeat
	TurnEntity Cube, 1, 1, 1
	UpdateWorld
	RenderWorld
	Flip
Until KeyHit( 1 )

With a GridSize of 10 producing 100 cameras, this runs fine. With a GridSize of 100 producing 10,000 cameras, it still runs (though quite slowly) and the cubes are understandably rather hard to see <g>.

How many cameras do you need?