Yes similar to JoltZero, but I feel that the main bulk of the green diffuse needs more variation. Compare it to the concept and you can see it has browns, reds and yellows. Bringing some of these in combined with the specular variation and it will break up that flat look. :)
Here is another image that may more properly illustrate the materials. I may need to play around with the environments in marmoset to better show off the model. The previous chosen environment had a lot of diffused lighting which may be washing away a lot of the material surfaces. Let me know if this looks better. This is…