Here are some test shots with the B+W to show you the 'warm' effect.
I'm going to do this over a few posts, so apologies in advance.
Canon T3i and Tokina 11-16 f2.8 @ f2.8 for each shot.
I have taken 3 shots, one unfiltered, one filtered with manual WB, one filtered with AWB.
I've then added two extra shots, one corrected using the QPcoloursoft 501 software that you download to use with the QPcard, and one corrected with Adobe Photoshop Elements.
Unfiltered. Camera set to daylight WB preset.