| context | Device context. |
| positionOffset | Offset measured from the beginning of the probe position buffer. |
| positionCount | Number of probes to integrate. |
| sampleCount | Number of samples to take. |
| ignoreEnvironment | Ignore environment lighting when computing direct contribution. |
| radianceEstimateOut | Buffer slice to write the radiance estimate into. |
void Return code.
Integrate direct radiance.
The integrator does spherical sampling of incoming direct radiance for each probe position.