Try it @ www.lightaffaire.com/tools
I needed to generate a lot of Trifecta (3 image collages) for an upcoming exhibition so ended up programming something to save me time. Maybe you find it useful as well.
Features:
Generates a print ready trifecta (3 image collage) with white or black border of your images.
Supports landscape (left-middle-right) and portrait (top-middle-bottom) orientation.
Supports mulitple DPI values for optimal sizing and print quality.
Supports mixing landscape and portrait format images (L-P-L / P-L-P).
Optionally converts generated trifecta to CMYK colorspace.
Optionally converts generated trifecta to black-white.
Note: Werbung / Verlinkung - required text under German law.
Did you mean triptych?
A trifecta is a three way bet.