Alt click on a node connection automatically disconnect it from the other nodes. And there is some nodes which can be easily summoned by pressing a key and clicking at the same time. Like B+click will place a branch, and S+click a sequence.
If you're willing to compile it, Aseprite is a great option as well.
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CRYENGINE: Terrain Highpass Texture
This video describes the process of creating high-pass textures for terrain in CryEngine. It differs from tutorials available from other licensees and Crytek. It might take you a few extra steps but you will see the benefits of utilizing high-pass to remove repeating patterns/lower frequencies and give a more natural texture to terrains.
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