I am encountering a strange issue with the Honeybee Annual Irradiance component (version 1.8.0).
My goal is to analyze how solar radiation spreads across a building facade. To do this, I created hundreds of independent planar faces in a grid layout across the vertical wall surface — one face per grid cell. Each face has its own normal vector, and I have confirmed that all normals are consistently oriented outward.
I used the Annual Irradiance recipe with:
- Recipe Type:
2 (rfluxmtx) - Detail Level:
0 (Low) - No shading geometry or context was added.
However, the results show strangely low irradiance values aligned by column (j-direction) — forming periodic vertical bands of unusually low values, even though there is no shading or obstruction in the scene.
All other faces show expected radiation values, and there is no difference in material, orientation, or location that would justify the drop.
Is there any known issue with using a large number of independent faces for facade analysis?
Could this be a bug related to face batching, sensor generation, or Radiance matrix misalignment?
Any help or insight would be greatly appreciated.
