The VRayPhysicalCamera allows you to use real-world parameters to set up the virtual CG camera (e.g. f-stop, lens focal length etc). It also makes it easier to use light sources with real-world illumination.
Basic
Name - here you can enter a name for the object.
Layer - If an element was assigned to a layer its layer color will be displayed here. This field reflects the layer color in the Layer Palette. You can drag & drop layers from the Layer Browser or similar layer fields onto this field. You can also assign layers or remove elements from current layers using the menus located behind the small triangle.
Lens parameters
Use Physical Camera - when this option is checked
VRAYforC4D's Physical camera tag will affect to c4d camera.
Camera type - specifies the type of the camera:
- Still camera - simulates a still photo camera with a regular shutter.
- Movie camera - simulates a motion-picture camera with a circular shutter.
- Video camera - simulates a shutter-less video camera with a CCD matrix.
Zoom factor - specifies a zoom factor. Values greater than 1.0 zoom into the image; values smaller than 1.0 zoom out. This is similar to a blow-up rendering of the image.
Lens Distortion - specifies the distortion coefficient for the camera lens. A value of 0.0 means no distortion; positive values produce "barell" distortion, while negative values produce "pillow" distortion.
Distortion type - determines what distortion formula is used when the Distortion value is not zero:
- Quadratic - this is the default distortion type. It uses a simplified formula that is easier to calculate than the Cubic method.
- Cubic - this is the distortion type used in some camera tracking programs like SynthEyes, Boujou etc. If you plan on using one of these programs, you should use the Cubic distortion type.
- Lens File - use distortion data from file.
Lens description file - path to file with distortion data.
Vertical shift and Horizontal shift - allow the simulation of shift lenses for 2-point perspective. Changing these parameters is similar to applying a Camera correction modifier.
Vignetting effects - when this option is on, the optical vignetting effect of real-world cameras is simulated. You can also specify the amount of the vignetting effect, where 0.0 is no vignetting and 1.0 is normal vignetting.
White balance presets - presets for different day time conditions.
White balance - allows additional modification of the image output.
Objects in the scene that have the specified color will appear white in the image. Note that only the color hue is taken into consideration; the brightness of the color is ignored.
Exposure
Exposure - when this option is on, the F-Stop, Shutter speed and Film ISO will affect the image brightness.
Film ISO - determines the film power (i.e. sensitivity). Smaller values make the image darker, while larger values make it brighter.
F-Stop - determines the width of the camera aperture and, indirectly, exposure. If the Exposure option is checked, changing the f-stop will affect the image brightness.
Shutter speed - the shutter speed, in inverse seconds, for the still photographic camera. For example, shutter speed of 1/30 s corresponds to a value of 30 for this parameter.
Fixed exposure increments
Fixed exposure increments - when this option is on, you can use physical camera as a real camera; all real camera works with not user defined value for f stop, iso and timing, but you can increase or decrease values with stop fraction. One stop define for the camera, half or double of light quantity for final shot,for example if you set f stop from 5.6 to 8 you will use half light for your shot.
Store exposure - this option can be used to optimize
DOF and Motion Blur use, to use this you must use On first Fixed exposure increments. First you must find correct exposure with fixed increments, then turn on store exposure, then turn On
DOF or Motion Blur and now you can modify fstop or timing for sampling feature without exposure modification.
1 stop increment - 50% plus or minus.
1/3 stop increment - 33% plus or minus.
1/3 stop increment - 33% plus or minus.
Shutter angle - shutter angle (in degrees) for the cinematic camera.
Shutter offset - shutter offset (in degrees) for the cinematic camera.
Latency - CCD matrix latency, in seconds, for the video camera.
Sampling
MBlur on - turns on motion blur.
DOF on - turns on depth of field sampling.
Subdivision - determines the number of samples (rays) for calculating depth of field.
Bokeh effects - defines the shape of the camera aperture. When this option is off, perfectly circular aperture is simulated. When on, a polygonal aperture is simulated.
Blades number - Number of blades.
Blades rotation - defines the rotation of the blades.
Center bias - defines a bias shape for the bokeh effects. Positive values make the outer edge of the bokeh effects brighter; negative values make the center of the effect brighter.
Bokeh anisotropy - allows stretching of the bokeh effect horizontally or vertically to simulate anamorphic lenses.
