# sketchup-model-how-to-fix-overlapping-faces-when-uploading-an-su-model

> Discover how to resolve overlapping surfaces in SU models on Coohom by adding simple surfaces to complex edges. Improve your design workflow. Start designing now.

- **URL**: https://www.coohom.com/helpcenter/sketchup-model-how-to-fix-overlapping-faces-when-uploading-an-su-model
- **Locale**: en_US
- **Updated**: 2026-06-10

## Content

Problem
=======

Phenomenon (After uploading the SU model, overlapping surfaces appear, the original SU model does not have overlapping surfaces)

After uploading the SU model to coohom, overlapping surfaces appear, as shown in the figure below:

![](//qhstatic-sg-s3.coohom.com/image/png/1701251575263/2CE61A502A2FE46D4DC1AD3793A92B38.png?x-oss-process=image/resize,m_mfit,w_603,h_462/format,webp)

The original SU model looks like this:

![](//qhstatic-sg-s3.coohom.com/image/png/1701251735850/40F6ECDDC3AED20A009661BBA34E7EE7.png?x-oss-process=image/resize,m_mfit,w_608,h_540/format,webp)

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The reason for the broken surface is that the Kujiale platform performs surface optimization on the uploaded SU model. If a complex single surface with maze-like or S-shaped edges is optimized, it may appear broken.

For example, the model above might have an issue with the optimization of the single-loop surface on the frame.

Solution
========

Add surfaces in the original SU model

Go back to the SU model, and at each corner of the maze-like surface, use the pencil tool to draw lines and add surfaces. Divide the whole surface into several simple surfaces.

![](//qhstatic-sg-s3.coohom.com/yuntai/image/jpeg/1762409144058/F9802B5DEEA2D50054F9F16C28DE5656.png)

Re-upload again, and the problem is solved

![](//qhstatic-sg-s3.coohom.com/image/png/1701252375142/9DF449ECED3EDC52D74DE71ABD29F795.png?x-oss-process=image/resize,m_mfit,w_555,h_399/format,webp)

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