> For the complete documentation index, see [llms.txt](https://docs.scenery.graphics/sciview/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.scenery.graphics/sciview/image-analysis/creating-and-exporting-isosurfaces.md).

# Creating and Exporting Isosurfaces

## 1. Hi there

![](/files/-MMykU6OcFtK8qoVKhDb)

After opening sciview, you are presented with the main window. In case the inspector on the right is not shown, you can double-click the tool icon in the tab bar to toggle it.

## 2. Open your file

![](/files/-MMykU6QiRzxIqeW10HI)

Open your file of interest from the Fiji main window. In this example, we use the `T1 Head (16-bits)`example image provided with Fiji.

## 3. Figure out the isosurface value

![](/files/-MMykU6RrimIe9AFTD1H)

When hovering with the mouse over the image you've just opened, Fiji will tell you the greyscale value under the cursor in the main window. you can use this to figure out the value you would like to use for the isosurface. In this example, we use **399**.

## 4. Create the isosurface

![](/files/-MMykU6SSU-4FWr4FOP5)

In the sciview window, click *Process > Isosurface.* This will open the window above. Enter the isosurface value you have determined. In case you have multiple images open in Fiji, these will show up in the *Image* dropdown. Be sure to select the correct image. Then click *OK* to create the isosurface. This might take a little while, depending on the size of the dataset.

*Note: Due to an issue with Fiji, an error might be displayed when opening the Isosurface tool. You can safely ignore this and close the console window.*

## 5. Inspect the Isosurface

![](/files/-MMykU6Ti5n65O0H-Fc3)

After sciview is done with processing, the isosurface will show up as *Mesh* in the sciview inspector on the right. You can double-click the Mesh object and then use Shift-MouseDrag in the main window to rotate around the mesh. If you are satisfied with the result, proceed to the next step. If not, you can delete the isosurface by right-clicking on Mesh, and selecting *Delete*.

## 6. Exporting as STL

To finally export the isosurface as STL file, simply select *File > Export as STL* in the sciview main window.