I did that in Gimp ... they are hand drawn, and I added some filters, relief map and painting, etc ... to highlight even more contour and shapes.

 There are 9 images in different approaches to jungle vines.

 They are in a .png format, with a transparent background.

 Some can be tileable horizontally, others tileable vertically, according to the approach used in the segments of each vine branch.

It resembles old comic book drawings and hand-drawn toons. They may still have some uses in compositions for specific game themes.

With adjustments to a shader in the game engines, they can be used as 3d texture (I tested it as 3d texture in Blender), or also as compositions in a parallax in a 2d game.

Change and create derived images if needed. You don't have to give me credit. These images are on CC0.

I hope they are useful in someone's project :)