Maaaan I have ended up on this forum like 6 times in the last 2 years. its not quite fixing what I need. 

I am looking to make a mirror of the standard shader, and like George is saying use that as a base to add other features. 

My problem.

I want the shader to be set to metallic/roughness, easy enough. I use substance painter and hit the export for unity. this packs my metallic/roughness into one texture for the standard shader. but then when I plug in the r and g channel into there respective slots in SF the result I get is totally off.

any ideas why?

The specific reason i am doing this is. I would like to have the shader act just like the standard one but ignore environment lighting. maybe there is a better way to do this per object but still I would like a mirror of the standard shader just to add things to it.

Hey joachim! i'm on unity 5.6.3 and when I go and click window>shader forge. nothing happens. I dont even get any errors. im at a total loss of what to do. ive already tried everything above and tried in a entirely new project.