3d meshes - Unity: how highlight effect should be applied to terrain mesh - Game Development Stack Exchange
Unity Shaderlab: Object Outlines | Will Weissman - Game Developer
Highlight Plus - All in One Outline & Selection Effects : Highlight Plus is a powerful asset that adds outline, glow, overlay, see-through and other effects to objects and characters in your
Highlight Unity GameObjects with Highlighting system : r/Unity3D
Outline Object on Pointer Hover and Selection at Runtime in Unity - YouTube