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• fov - The horizontal field of view in radians.
• orthographic - Enable to have orthographic projection instead of perspective.
• transform - A transformation (rotation + translation) which defines where the camera is and how it is rotated. The matrix is in column-major format and you will need to calculate it yourself. You can't set rotation angles as in most 3D software. The default camera orientation with identity matrix is so that +ZY is pointing up and +Y -Z is the view direction. If your scene uses +Y for up-axis, you will need to set V-Ray's scene up-axis accordingly - see the Units subsection in the settings section below.

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• meters_scale - Multiplying scene sizes by this value should yield object sizes in meters.
• photometric_scale - Scale for photometric lights.
• seconds_scale - When doing animation, this is the reciprocal of the framerate
• scene_upDir - This needs to be set if the scene has an up-axis different from the default, which is +Z. This parameter is meaningful only for some plugins, if the client wants to implement rotation, for example.
• rgb_color_space - Affects Sun/Sky color, color temperatures and dispersion in refractive materials.

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