UBlueprintMaterialTextureNodesBPLibrary

Function library class. Each function in it is expected to be static and represents blueprint node that can be called in any blueprint.

When declaring function you can define metadata for the node. Key function specifiers will be BlueprintPure and BlueprintCallable. BlueprintPure - means the function does not affect the owning object in any way and thus creates a node without Exec pins. BlueprintCallable - makes a function which can be executed in Blueprints - Thus it has Exec pins. DisplayName - full name of the node, shown when you mouse over the node and in the blueprint drop down menu. Its lets you name the node using characters not allowed in C++ function names. CompactNodeTitle - the word(s) that appear on the node. Keywords - the list of keywords that helps you to find node when you search for it using Blueprint drop-down menu. Good example is "Print String" node which you can find also by using keyword "log". Category - the category your node will be under in the Blueprint drop-down menu.

For more info on custom blueprint nodes visit documentation: https://wiki.unrealengine.com/Custom_Blueprint_Node_Creation