For this tutorial, you will need a tube and the corner to download here.

1 – Select a dark and a light color of the tube.

2 – Open a new image 600 x 600. Flood fill with the dark color.

3 – Effects – Texture effects – Blinds, with the following settings :

Pick the light color. Repeat the same effect with Horizontal unchecked.

4 - Effects – Distorsion effects – Displacement maps :



5 – Selection – Select all.
Select – Modify – Contract : 50 pixels.

6 – Effects – 3D effects – Cutout :



7 – Paste your tube as a new layer.
Decorate with the corner that you will have colorised to adapt to your image.
The trick to colorise is to click on the color swatch you want to match, then note the Hue (H) and Saturation (S) and then go with Adjust – Hue and Saturation – Colorise and use the same values.

8 – Sign and merge all.

9 - File – Export – JPEG optimizer.