Multi distant radiance meter (mdistant)

Multi distant radiance meter (mdistant)#







Comma-separated list of directions in which the sensors are pointing in world coordinates.


point or nested shape plugin

Optional. Define the ray target sampling strategy. If this parameter is unset, ray target points are sampled uniformly on the cross section of the scene’s bounding sphere. If a point is passed, rays will target it. If a shape plugin is passed, ray target points will be sampled from its surface.



Optional. Define the ray origin offsetting policy. If this parameter is unset, ray origins are positioned at a far distance from the target. If a value is set, rays are offset by the corresponding distance.

This sensor plugin aggregates an arbitrary number of distant directional sensors which records the spectral radiance leaving the scene in specified directions. It is the aggregation of multiple distant sensors.

By default, ray target points are sampled from the cross section of the scene’s bounding sphere. The target parameter can be set to restrict ray target sampling to a specific subregion of the scene. The recorded radiance is averaged over the targeted geometry.

Ray origins are positioned outside of the scene’s geometry.


If this sensor is used with a targeting strategy leading to rays not hitting the scene’s geometry (e.g. default targeting strategy), it will pick up ambient emitter radiance samples (or zero values if no ambient emitter is defined). Therefore, it is almost always preferable to use a nondefault targeting strategy.


This sensor must be used with a film with size (N, 1), where N is the number of aggregated sensors, and is best used with a default box reconstruction filter.