# Creating Masks with Polylines

To create masks, define all the areas with polylines for which you want to generate texture masks. Then, export these polylines in SVG format. It’s helpful to create a dedicated layer for this purpose, as you’ll need to select only the specific polylines to export.

****Example****: I need to cover certain areas with the Concrete01 texture.

- First, I create a new layer and place all the export-ready polylines there.  
    [![image.png](https://wiki.nabla.sh/uploads/images/gallery/2024-11/scaled-1680-/R6simage.png)](https://wiki.nabla.sh/uploads/images/gallery/2024-11/R6simage.png)
- Then, I draw the polylines, adjusting their colors as needed to differentiate them.  
    [![image.png](https://wiki.nabla.sh/uploads/images/gallery/2024-11/scaled-1680-/GrXimage.png)](https://wiki.nabla.sh/uploads/images/gallery/2024-11/GrXimage.png)

#### Tips

- ****Creating Polylines from Existing Splines or Polylines****:
    - <span style="white-space: pre-wrap;">Switch to the </span>**Vector Tool**, select points from an existing polyline or spline.
    - <span style="white-space: pre-wrap;">If you want to select all points, use the </span>**Select All**<span style="white-space: pre-wrap;"> button.</span>
    - <span style="white-space: pre-wrap;">Click </span>**New Polyline from Selected**<span style="white-space: pre-wrap;"> to create a new polyline from the selection.</span>  
        [![image.png](https://wiki.nabla.sh/uploads/images/gallery/2024-11/scaled-1680-/4Gjimage.png)](https://wiki.nabla.sh/uploads/images/gallery/2024-11/4Gjimage.png)
- ****Creating Rectangles, Squares, or Circles****:
    - Start by creating a polyline with at least two points.
    - <span style="white-space: pre-wrap;">Convert this polyline into a </span>**Polyline Area**.  
        [![image.png](https://wiki.nabla.sh/uploads/images/gallery/2024-11/scaled-1680-/HFHimage.png)](https://wiki.nabla.sh/uploads/images/gallery/2024-11/HFHimage.png)
- ****Experimenting with Parameters and Buttons****:  
    Adjust parameters and explore available options to get the desired results.  
    [![image.png](https://wiki.nabla.sh/uploads/images/gallery/2024-11/scaled-1680-/f2Yimage.png)](https://wiki.nabla.sh/uploads/images/gallery/2024-11/f2Yimage.png)

****Examples of Results****: This technique isn’t limited to creating masks; it can also be used for roundabouts, soccer fields, etc.  
[![image.png](https://wiki.nabla.sh/uploads/images/gallery/2024-11/scaled-1680-/Qrximage.png)](https://wiki.nabla.sh/uploads/images/gallery/2024-11/Qrximage.png)

### Limitation

Currently, I haven’t found a straightforward solution for creating masks for curved runway generators. After all, who needs curved runways, right? 😂 The default road generator lacks a Concrete (non-transparent) material, so until someone develops it, the only workaround is approximating curved roads with carefully placed polylines.