You can use a Sprite Texture in a Material but Sprites are just textures mapped to a planar mesh. It wouldn’t make sense for them to be used in a Material; it would be similar to asking how can I add a Static Mesh or Skeletal Mesh to a Material.
Here is some good info:
For the tiling, you need to input a TexCoord in the textuer sampler node “UV”. In the detail panels of the TexCoord Node, you can set the tiling properties.
Hope that helps =)
I’d like to create a material that uses a sprite instead of a texture. How do I do that?
Also, I’d want the sprite to be repeated throughout the object I apply it on, instead of being streched out, how to do that?
I’ve read the documentation earlier but couldn’t understand it 
Right at the bottom, on that picture out of Material Editor, I don’t know what is and how to get the TexCoord and SpriteTexture node.
Thanks, that was really helpful!
But still, I don’t know how to apply sprites onto an object. Maybe I’ll describe in more detail what I’m trying to do:
I’d like to have a plane that is covered in repeated sprites. Moreover, the sprites are drawn in isometric projection, so I need them to cover up the entire plane without blank spaces. First of all I’m trying to even apply the sprite onto the plane, so, how do I do that using the TexCoord and the SpriteTextureSampler?
Then this set of videos will be extremely useful for getting around the material editor.
Good luck =)
