> For the complete documentation index, see [llms.txt](https://windows.help.formit.autodesk.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://windows.help.formit.autodesk.com/formit-capabilities/conceptual-modeling.md).

# Conceptual Solid Modeling

Quickly and easily create conceptual geometry to work through design options.

FormIt's solid modeling kernel enables incredible, time-saving workflows to make modeling easy and efficient.

**Learn why solid modeling is advantageous, and how to ensure your model is solid so it can be used in downstream applications, like Revit:**

{% embed url="<https://www.youtube.com/watch?v=XFL-b1DgZiQ>" %}

**Once your model is solid, you can take advantage of solid extrusion techniques to quickly clean up geometry and maintain organized models:**

{% embed url="<https://www.youtube.com/watch?v=80H8lFlFQ8o>" %}

**Additionally, use Smart Selection tools to quickly select similar geometry and save clicks:**

{% embed url="<https://www.youtube.com/watch?v=akLeB1FADt4>" %}