Did you know you can customise the stair treads to have any shape?
- Select the stair in 3D and click on the Edit button

- Select a tread, right-click and convert it into a morph

- Exit the Edit mode and modify the morph as you wish

- Select the morph and go to File > Libraries and Objects > Save Selection As > Stair Tread
- After naming it, place the stair preview in the correct position

- Select the stair, enter the settings and apply the customised tread

- The first tread will be missing, so enter Edit mode and tick the box Tread

- You can also apply a different pattern by manually selecting the treads on Edit mode and change the custom tread