Sorry if this has already been asked, I did try a search and didn’t find anything relevant.
Is it posible to render in monochrome, I know I could just take the rendered output into Photoshop or GIMP and do it, but I was wondering is there a way to do this in cycles without needing any post.
You cant render in black and white as such - but you can output in black and white without going via compositor.
For image renders - when you render - then click “Save As” on the image panel - there is a "BW"option on the left of the save screen (just below where you set your image format (e.g. JPEG, PNG etc)
For animations - on the “Render” tab under “Output” - there is a “BW” option for outputting animation files to black and white.
Using compositor or photoshop however will give you much more control and will allow you to tweak the B&W image (perhaps simulating colour filters etc).
Brilliant, just what I wanted. I’ve never used the compositor before so took me a while to work out how to set those nodes, but its perfect for what I want.