(set to "Default") to clean up any remaining grain without losing detail. 3. Global Illumination (GI)
| Problem | Likely Cause | Fix | | :--- | :--- | :--- | | Grainy, even after long render | Noise Threshold too high | Reduce to 0.005 or 0.01 | | Splotchy shadows on walls | Light Cache Subdivs too low | Increase to 1500 + | | Very long render times | Max Subdivs unnecessarily high (e.g., 200) | Reduce to 64 for final | | Too dark / blown out | Color Mapping Exposure | Adjust Exposure value (try 1.2–2.0) | | Noisy reflections | Low Image Sampler Max Subdivs | Increase to 32 or 48 | vray render settings for sketchup