When every time I download the powder toy I am trying to find the powder.h file. I can never seem to find it to edit elements or create new ones. Does anyone know how to find the powder.h file?
It's in Source/includes/powder.h But if you want to add / edit an element, the element list has been moved to Source/src/elementdata.c
Just a hint to you: Adding elements in Powder Toy means programming them in a programming language called C. Or, you could "replace" existing elements with Lua, but that's a different story at all.