Went off the rails, turned the camera on its side, and pulled out some gels. That’s a straight cyan on the front and a straight yellow on the back. Both are underexposed, which—I guess I’d never internalized—takes the tones way down to an interesting place. Is that because of reduced luminance? To be fair to the final image, I also toned the shadows and highlights just a hair, added some vignette, and desaturated the whole thing maybe 35%. But I would have done that anyway.
So to the lighting...I kept exploring the blocks with the diagonal cut. I painted a white background yellow with a single Acute head w/ 7″ reflector set to 7 or so, enough out from the lamp to let me tape on the gel. I flagged the yellow off the blocks with a piece of black foam core sitting on top of the blocks, plus some cinefoil wrapped around the bottom of the reflector to control spill.
The cyan source (w/ 7″ reflector set up the same as the other) was a few feet away with flags basically knife edged to the light, one knocking down the light on the left block, the other knocking down the right. I built a little box around the background to keep any cyan light from getting back there and making the yellow muddy. In working with the Profoto Acute, I’m learning how to use the ratios (my Broncolors have digital dials and each channel is independent). It’s an interesting constraint and in this case I used both B channels, so I’d get equal power to each head. I then controled balance, intensity, fall off, spread, etc. by moving the light. Such a great practice. Had I used two monolights or a pack with individual controls, I would have been tempted to play with ratios of power rather than distance, and distance changes the shape of the light whereas power does not.
The last important bit is a piece of black foamcore I slipped into the gap to prevent reflection in between the blocks. I mistakenly blocked most of the yellow light, and low and behold, that was the picture.