Unaided .

I found this [sidefx.com], but still I have not tried.
It seems is that I will need.

Now it works! Thank you!

As I see in Mantra render the texture mapped, I think that boxSOP already generate auto UV.

So, for this example is perfect, but now I've that generate UV from a skinSOP for a dynamic geo. I mean, can't edit with UV Pelt or unwrapping handly.

Yes, I'm using Mantra in this screenshot, but for now only need show in viewport a texture for UV coords purposes.

Usually others 3D packages have connected basic shader parameters from built-in or third party render engines to render engine used in viewports to show textures for example.

However, something I should to do wrong, cos I put a image in Mantrasurface/OpenGL/Surface/Texture1 and no wants shows in viewport.

I understand that a simple BoxSOP have automatic UV coords by default, so a checker is shown correctly mapped rendering with Mantra.