Obviously you could mix and match layers and blend modes all night long. Here's
a few more examples just to get you started:
Variation 1 was created by setting
the Copy 3 blending mode to Color and the Opacity at 100%. The other layers
and variables were unchanged.
Variation 2 was created by setting
the Copy 2 blending mode to Difference and 100% Opacity. Copy 1 was set
to Hard Light and 100% Opacity. Copy 3 was unchanged from the previous variation.
Variation 3, with its rich blues
and golds, was created by setting the Copy 3 layer to Difference and 49%
Opacity. Copy 2 is set at Difference and 100% Opacity. Copy 1 is set at
Normal, 100% Opacity, and the background layer is hidden.
Variation 4 was created by setting
the Copy 3 Layer to Color Dodge and 51% Opacity. Copy 2 is set to Color Burn
and 41%, while Copy 1 is set to Normal. The Background is hidden.