# render-how-to-handle-abnormal-light-sources-during-rendering

> Solve wall and ceiling shadow issues by adjusting custom lighting sources. Ensure optimal lighting in your interior designs. Start designing now.

- **URL**: https://www.coohom.com/helpcenter/render-how-to-handle-abnormal-light-sources-during-rendering
- **Locale**: en_US
- **Updated**: 2026-06-11

## Content

Problem
=======

The wall has light and shadow, the ground has light and shadow, or there is a blue light source at a certain position, and the surface light and ceiling overlap causing shadows and other issues.

![](//qhstatic-sg-s3.coohom.com/yuntai/image/jpeg/1762135272598/BCCC5B64072D0F821B4822BE71DFCA13.png)

Solution
========

Enter Custom lighting, check if there is a light source at the corresponding position, and delete or adjust it as needed.

![](//qhstatic-sg-s3.coohom.com/yuntai/image/jpeg/1762135272610/150BB9B2F596979081B2932B95D1688E.png)

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