I’m using DIALux 13.0 and have placed a diesel generator object with dimensions L × W × H = 17 × 4 × 4 meters and a stack with a height of 12 meters. I created a plane for the outdoor external yard with a height of 0.0 meters and a wall zone of 0.0 meters. After running the calculation, I’m not getting the required uniformity with the object in place. However, I do achieve the required uniformity when calculating without the object. I need to obtain uniformity while keeping the object in place. Could you please help me achieve this result? Let me know if you need further refinements! 😊