Sometimes we have models which includes intersection, likes below:

![](https://cdn.steemitimages.com/DQmQ1xxCQuwwTpPqHrzpvbz4oVJGh5Ug4DT5CgjV35rJMLB/image.png)

That will make fail for 3D printer slicing, so we have to remove the intersection.

Create a cube big enough which can wrap the models into it.

![](https://cdn.steemitimages.com/DQmd4bZx8P4HxNkyQq86qmvZbNChbBkPDV8c5U44qoga3CW/image.png)

Then add a boolean modifier likes below:

![](https://cdn.steemitimages.com/DQmY2iAahaaxh6RVWhsbSG1hypNR8JTaetCqDMVSvhUr51c/image.png)

You can see the intersection part removed.