i am not sure the spec is working too well, looks like you just upped the saturation nad contrast of your diffuse, maybe give it a slight blue/green tint if it's metal ?
Very cool textures. As for what Fuse said, I actually have to disagree. I think the red spec is working really nicely with the purple diffuse; it gives a nice car paint effect, which it would kind of lose with a blue or green spec.
Thanks for the encouragement to quickly answer some of the questions The roots were made by creating renderable splines for the large ones and modeling them out in a sculpt package although i didnt go very highpoly with them. I then applied some 16bit displacement maps I created to add the finer detail. The smaller roots…