Your 3D light model is flickering typically due to lighting setting conflicts, insufficient render sampling, or geometry overlapping the light source.
- **Lighting conflicts**: Overlapping lights or incorrect shadow parameters (like too much shadow bias) create inconsistent light. - **Low sampling**: Too few render engine samples mean uneven light smoothing, leading to flicker. - **Geometry overlap**: A light inside/too close to an object (e.g., a bulb in a wall) causes conflicting light paths.
Try isolating the light—hide objects or disable lights one by one. This quick step pinpoints the cause so you can adjust settings easily.