Hi,
With ref to alamy's requirements re the black and white points of an image.
I have just recently invested in a photography table with a permanent white vinyl cover, (plus a black vinyl overlay). Experimenting, it does seem desirable to deliberately introduce some subtle shadows. However for the rest of the background, it seems to be impossible to obtain both a full pure white background and a black right hand triangle.
Has anyone ever got a submission with a white background through QC with a white highlights triangle and highlight peaks through the roof? It seems best to ask the knowledgeable people on here rather than risk losing the three stars by adopting a suck it and see what happens approach.