Kevin Snyder posts a look at how to apply a texture that can span across multiple clones to achieve a seamless look in Cinema 4D. Kevin makes note that applying textures to multiple Mograph objects can be a bit tricky in Cinema 4D.

Applying textures to multiple Mograph objects can be a bit tricky in Cinema 4DKevin Snyder – CGtuts.com

Here he shows a technique that can be a solution for other instances in C4D, that can offer you more flexibility when just texturing in general. Check out the tutorial for Spanning a Texture Across Folding Splines in C4D here.