The thing I didn't like about mental ray was that it wasn't as hands-on as many other methods of texturing and largely involves inputting numbers to configure. And furthermore, the colouring of the material was solid and the rest of the group advised me to use texturing that was easier to render, but also had a colour scheme which blended together more naturally.
I then decided to create a texture from scratch in Photoshop by creating a PSD Network, and here was the first outcome.
Nat. It is a fairly simple process, which involves selecting how I want a certain layer to appear in a composition.
Here is how the 3D Model looks with this texture.
The manhole cover is actually made up of dark brown colours, and has very little rust. My model almost looks like stone in comparison to most manholes.
I sampled the colours of this manhole and applied it to the stucco layer of my texture, as pictured below.
I also reduced the rusting texture effect that I had applied, and here was the outcome.
I have actually produced two versions of the model with this new texture; the first with the rusty metal overlay as pictured below...
And the second, without a rusty metal overlay, and a more plain, solid look.
I will show these to the rest of the team and find out which one they think will fit in more with the scene.