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This page provides information on the Light Meter utility.

 

Overview

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The VRayLightMeter helper is an aid for evaluating how a scene is illuminated. It is intended to simulate the use of a real-life light meter used in photography and film production.

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The information presented by the VRayLightMeter does not change or otherwise affect the lighting in the scene; it only reports on it. This helper is intended to provide information so you can make adjustments to the scene's lighting at your own discretion.

 

UI Path: 

||V-Ray menu|| > Create > Helpers > V-Ray Light Meter

||Create menu|| > Helpers > V-Ray > V-Ray Light Meter > Click and drag in viewport

||Command panel|| > Create tab > Helpers > VRay category > VRayLightMeter button > Click and drag in viewport||V-Ray menu|| > Create > Helpers > V-Ray Light Meter

 

VRayLightMeter

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Active – Enables or disables the VRayLightMeter helper.

Dimensions

The options in this group allow you to specify the dimensions of the light meter tool and its resolution - the number of points at which the illumination is measured.  

Width – Width of the VRayLightMeter.  

Length – Length of the  VRayLightMeter.  

Width segs – Resolution of the VRayLightMeter in the X direction.

Length segs – Resolution of the VRayLightMeter in the Y direction.  

Preview

The settings in this group control the way the illumination information is represented in the viewport.  

Orientation – Enables or disables the preview of the direction from which the light is coming.

Viewport text – Enables or disables the preview of the actual values of the illumination for each point.

Pseudo Colors – When enabled, the VRayLightMeter displays a gradient to illustrate the variation in the illumination.  

Logarithmic  – Changes the illumination scale to Logarithmic for the purposes of displaying it in the viewport . This is useful when there is a great variation in the illumination. 
Min  – Specifies the minimum illumination displayed in the viewport in lux. 
Max  – Specifies the maximum illumination displayed in the viewport in lux.  

Measured values – Specifies which part of the illumination in the scene is measured:  

Total illuminance – The total illuminance is measured, which includes direct light, GI, and light coming from the environment. 
Direct illuminance – Calculates only the illumination from direct lighting. 
Indirect illuminance – Calculates only the effect of the indirect illumination. 
Day light factor – Calculates the illumination coming from the sky.  

Error Tolerance – Controls the precision of the VRayLightMeter. Higher values are faster to calculate, but may appear noisy. 

Calculate – Press this button to calculate the measured values at light meter helper's grid points.  

Save to CSV file – Saves the result in a .csv file.

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MaxScript Methods

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