The heatmap of cumulative radiation show always a "mosaic" pattern

Hallo dear Forum.

Every time I try to map cumulative radiation, the heatmap always shows this “mosaic” pattern.
As can be seen, even when the raster is extremely fine (10 cm), there can be differences of up to 50% in kWh/m² between adjacent sensors.

Do you have any suggestions on how to solve this problem?

Thanks and best regards

Hi @LaFleur,

Are you able to share a sample Grasshopper file with internalized geometry or the Rhino file?