Hello everyone, I’ve been trying to understand this node system and I think I understand everything except the M1-M2 Height blend section. However, I can’t understand the structure here. If anyone can help with this, it would be greatly appreciated.
I see that Material 01 and Material 02 height maps are 2D texture parameters, but I couldn’t understand what happened next.
He’s using the vertex-color node to sample different channels for alpha. So, this person has baked the masks into the mesh itself. There’s no texture/math to generate the mask, it’s ‘sampled’ directly from the mesh.
First of all, thank you so much for your message. I’ve been trying to figure this out on my own for a long time, and I’m so glad you’re here.
I think I understand exactly what you’re saying, but I still can’t figure out what the nodes might be.
I’ve created almost the entire structure. I just can’t figure out the Height Blend section in the bottom center.
I cannot tell you what nodes they use as the picture is not detailed enough.
I can say they are not LERPs or anything with 3 inputs, so likely add/sub/mul/div but again, I can’t say anything for sure.
Whatever you are doing, if you are trying to recreate the picture, I think you are destined to fail as you don’t have the masks baked into the mesh.
For a replacement, look at the height-blending node, and the heightblend with 2 heightmaps.
I have my own Height maps. All I need is the nodes in this section.
I cannot give you the nodes as the pic is just not detailed enough. 
it seems he does use 2 heightmaps, so check that stock function if you want to see how it works. This is 4 textures blended using that function if you need to see results, it seems pretty smooth to my eyes (rocks, dirt, stones/gravel, and grass):
Yes, this structure is quite successful. In the example I gave, simply nesting the height maps within each other provides a general transition.
What kind of structure do you use in your structure’s node system?
You’ll notice that in the image I’m targeting, the height lerp structure isn’t used; instead, it’s just the lerp structure.
I just use 0 → 1 greyscale heightmaps, likely as we all use.
For the structure it’s the heightlerpwith2heightmaps node:
I only use the alpha-path, no diffuse and then use that alpha to blend materials, etc, etc..
This looks like a great structure. But I’m very close to achieving the structure in the image, and I just want to understand what the nodes are.
again, guy, you are asking a question which cannot be answered.
IF there was some information at the top of those nodes, like an S or an A, something we could read, I might be able to say it’s an Add node, etc.
In this case, it’s a set of nodes with 2 inputs, and the results seem black, so I can’t say if it’s multiply, add, etc.
You will have to come up with your own structure as the picture doesn’t contain enough information.
My suggestion is to look at the 2heightmaps node, break it apart and see how it works. It’s very likely the person here is doing something very similar (it’s the same problem right?).
I think the two rows of nodes at the bottom, in the Height 2 input, are subtract, and they appear black in the example. I’m trying to guess what’s in the top row.
We’re getting closer to the result. We need to keep trying.
YOU need to keep trying.. I already have a solution.. 
good luck though. keep plugging away but realize others have already been here and solved this issue; lean on their work.
There are certainly many similar solutions, but none as good as this example. If I can manage it, I’ll show you in a video.
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