Add texcoords and tangent values to soy.scenes.Planar such that repeating patterns can be used. Refer to our LoD generated vertex points for generating texcoords and tangents in the same function:

In order to render correctly, while the flat ground is always rendered centered on the Camera, the texture matrix will need to be changed to reflect Camera movement. A property should also allow setting the scale of the texture matrix.

Demonstrate this working with a small example that uses a bumpmap, colormap, and moving camera. You may want to write the example first to make debugging easier.

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When you've done, commit your work and post the resulting changeset url to this task.