Shader tutorial Water shader tuto Grass shader
Tips project godot Godot Tricks GD Extensions
You can use displacement on Depth attribute of spatial material.
A specular map huh? Unfortunately for you, Godot only supports one workflow and that's the metallness workflow. What you would need to do is convert your texture maps accordingly; specifically the albedo and specular maps. According to this webpage you must do the following to convert from specular to metallness. https://marmoset.co/posts/pbr-texture-conversion/
Diffuse → Color
Normal → Normal Map Displacement -conversion→ metalness Specularity Ambient Occlusion
cc0 = https://ambientcg.com/ Scale à inverser https://www.youtube.com/watch?v=LXnW6WL7cSE
PBR Blender to export in gltf godot
Materialize soft Use materialize pbr seamless avec roughness