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# mr_Photographic_Exposure_Control : ToneOperator

    mr_Photographic_Exposure_Control - superclass: ToneOperator; super-superclass:MAXWrapper - 23:0 - classID: #(1932620593, 1226131043)

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The mental ray Photographic Exposure Control is a tone operator implementing real-worldconceptsand presetsfamiliar from traditional photographyinto the mental ray rendering workflow.

Available in 3ds Max 2008 and higher.

Constructors

    mr_Photographic_Exposure_Control... mrToneMapExposureControl...

Properties

## General

    <mr_Photographic_Exposure_Control>.active BooleanClass default: true -- boolean;

Get/set the Active state of the exposure control. When set to false, the control will not be applied.

    <mr_Photographic_Exposure_Control>.processBG BooleanClass default: false -- boolean; Process_Background

Get/set whether the exposure control will process Background and Environment Maps.

## Exposure

    <mr_Photographic_Exposure_Control>.preset Integer default: 5 -- integer; Exposure_presets

Get/set the Exposure Preset in the drop-down list.

Possible values are:

0 - Physically Based Lighting, Outdoor Daylight, Clear Sky

1 - Physically Based Lighting, Outdoor Nighttime

2 - Physically Based Lighting, Indoor Daylight

3 - Physically Based Lighting, Indoor Nighttime

4 - Non Physically Base Lighting

5 - [Select a preset](default)

    <mr_Photographic_Exposure_Control>.exposure_mode Integer default: 1 -- integer

Get/set the state of the Exposure Mode radio buttons.

Possible values are:

0 - Exposure Value (EV)

1 - Photographic Exposure

    <mr_Photographic_Exposure_Control>.exposure_value Float default: 10.0 -- animatable; float

Get/set the Exposure Value.

    <mr_Photographic_Exposure_Control>.shutter_speed Float default: 125.0 -- animatable; float

Get/set the Shutter Speed in 1/N sec.

    <mr_Photographic_Exposure_Control>.f_stop Float default: 16.0 -- animatable; float; Aperture

Get/set the Aperture (f-stop) value in f/N.

    <mr_Photographic_Exposure_Control>.film_iso Float default: 100.0 -- float; Film_Speed;

Get/set the Film Speed value (ISO). This is the internal value used by the tone operator.

    <mr_Photographic_Exposure_Control>.film_isoUI Float default: 100.0 -- animatable; float; Film_Speed

Get/set the Film Speed value (ISO) as exposed to the UI. This is the animatable value shown in the User Interface.

## Image Control

    <mr_Photographic_Exposure_Control>.burn_highlights Float default: 0.25 -- animatable; float; Highlights

Get/set the Highlights (Burn) value.

    <mr_Photographic_Exposure_Control>.midtones Float default: 1.0 -- animatable; float

Get/set the Midtones value.

    <mr_Photographic_Exposure_Control>.shadows Float default: 0.2 -- animatable; float

Get/set the Shadows value.

    <mr_Photographic_Exposure_Control>.saturation Float default: 1.0 -- animatable; float

Get/set the Color Saturation value.

    <mr_Photographic_Exposure_Control>.whitepoint Color default: (color 255 255 255) -- fRGBA color

Get/set the Whitepoint as a color value.

    <mr_Photographic_Exposure_Control>.whitepointKelvin Float default: 6500.0 -- animatable; float; Whitepoint_in_color_temperature

Get/set the Whitepoint value in Kelvin.

    <mr_Photographic_Exposure_Control>.vignetting Float default: 0.0 -- animatable; float

Get/set the Vignetting value.

## Physical Scale

    <mr_Photographic_Exposure_Control>.physical_scale_mode Integer default: 0 -- integer

Get/set the state of the Physical scale mode radio buttons.

Possible values are:

0 - Physical Units (cd/m 2 )

1 - Unitless

    <mr_Photographic_Exposure_Control>.physical_scale Float default: 1500.0 -- animatable; float

Get/set the Physical scale value used when .physical_scale_mode is set to 1 - Unitless.

## Other values (not exposed to the UI)

    <mr_Photographic_Exposure_Control>.cm2_factor Float default: 1.0 -- float; Physical_Scale;

Get/set theinternalPhysical scalefactor.

    <mr_Photographic_Exposure_Control>.gamma Float default: 1.0 -- float; Display_gamma;

Get/set the display gamma value.

    <mr_Photographic_Exposure_Control>.gammaOnOff BooleanClass default: true -- boolean; Display_gamma_enabled;

Get/set whether the display gamma is enabled or disabled.

    <mr_Photographic_Exposure_Control>.multiplier Float default: 1.0 -- float; Non_physical_multiplier

Get/set the non-physical multiplier value.

    <mr_Photographic_Exposure_Control>.shader_mode Integer default: 0 -- integer

Get/set the shader mode.

#### See Also

- Interface: SceneExposureControl

- ToneOperator : MAXWrapper