The board is white and i used colored gels to color the flash projection onto the board. When i used no gels (going for a white color) the outcome was always to uneven. It was either all white backround or a gradient of white to grey that just didnt look smooth. The red/blue color made the gradient much more tolorable. IMO the only background that looks good white, is 100% white, and with the one flash i had, it was impossible to achieve without completely over exposing everything. If i toned down the flash for better exposure, i got the ugly grey gradient.
Next photoshoot i might try strobes for the background.
jB