Writing shaders for UE4; where do I start?

Found this link saved in my browser (between thousands) and it is RCaloca’s blog (Epic’s employee): https://rcaloca.blogspot.com.br/2017…rs-to-ue4.html

Usually I exchange info on Vulkan issues with him.

You might want to take a look there on each engine release because some API changes are 1st seen there. Also, on every new engine release, Epic’s own plugins for the composite (lens distortion plugin) are a reference on API changes aswel.