Can I tile only a section of a texture?

I’m currently using one diffuse, normal and opacity map for all the foliage in my game, however since I have some empty space to be able to quickly implement future foliage, I’m wondering if I can also use these texture images to contain the tiling maps for the things like grass, dirt, and sand the foliage sits on.

While I could find lots of answers for tiling an entire image, unable to find if what I’m looking for actually exists.

For example I’d like to have an image laid out like the one below, with each colour being a different texture, and then have sections 3 and 4 containing all my foliage textures, while 1, and 2 (red, green) being 2 different materials that tile 1 completely red, 1 completely green etc.

Is this even possible?

http://pixeltots.com/wp-content/uploads/sites/2/2014/07/4.four_pose_h.jpg

http://pixeltots.com/wp-content/uploads/sites/2/2014/07/4.four_pose_h.jpg

Yep it is doable. You can check this link. It is for UDK, but is still applicable for UE4.


This forum thread might also be useful.