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The method to adjust Unity point light --> near plane to a value smaller than 0.1 is:

1. Select the point light in the Unity Editor.
2. In the Inspector panel, scroll down to the Light component.
3. Locate the "Near" parameter and reduce its value to the desired level (e.g., 0.05).
4. If the value is below 0.01, enable "Use Shadow Bias" and adjust the "Shadow Bias" parameter until the shadows look correct.

Note: Reducing the "Near" parameter too much can cause artifacts and other graphical issues. It is recommended to keep it above 0.01 unless absolutely necessary.