Thank you Ondra.
@Rawalanche, I do agree, but the way learn an engine the way it is now is more or less learning an interface... not the fundamental, in a relax way, on my couch for example... and believe me or not, I know my shit in render engine / fundamentals. But still, having to check if a button IS NOT THERE to know it is a no go feature for now, well, that is an issue.