Summing Data in ARNs
This knowledge base article discusses how to iterate calculations and sum the results in the ARN (Analysis Results Node) via a script. One reason why this might be useful is that when tracing a large number of rays, tracing in batches and summing the results after each step might be more time‐efficient. This will be particularly suited to illumination models where a very large number of rays are required to obtain statistically good data. This example script sums both the Irradiance and color image data and then stores the resultant ARNs in the Analysis Results folder on the FRED tree and also as .fgd files in the current directory.
Download the FRED Script: IteratedCalculationsAndSummingARNs.frs
Download the FRED File: SummingARNsTestFile.frd