Swamp WIP #3

Things looking good. Lots of small additions and tweaks.

Got in some extra assets like proper cloth/net, ropes and metal parts. Set up some vertex shaders to paint wetness/moss on wood and moss/wind on ropes. All painting done inside UE with paint tool. 

Also added mask on wood that enables wood to have paint layer on top of it. It uses bitmap mask for that, I got 3 of them in Photoshop with color range selection, just playing with intensities and whatnot. Idea was to use base diffuse and get correct information from it to then overlay that mask inside editor so that paint layer and diffuse underneath blend perfectly, creating convincing look. As the pain layer is just a mask, you can change it in material instance, you can choose from 3 different masks (all gray packed into single texture) and tweak other parameters like color, roughness, spec etc.

Also tried out new LoD system that came out with 4.14, it's fantastic. Basically like Simplygon but free and works within the engine. Very fast and produces great results, frankly cannot ask more from it (maybe some kind of billboard generation for things like trees, the way Speedtree does it, but that a little crazy I think).

Was a little worried that trees might look too good as they are done entirely by hand and there are issues with shading, but in the end I think results are great.

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