🔔 I mostly attained this via experimenting in AC6's emblem editor, but if you want to replicate some of my results:
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To achieve the 'embossed' look, I did a base layer in the primary color, then copied that layer, inserted the copy one layer above it, changed the color to the intended accent, and then switched it to an appropriate gradient.
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Similarly, for the two tone gradient moon, I took a standard circle, put it in the appropriate shade, copied that, inserted that layer above it, switched it to the 'moonscape' pattern, adjusted it to fit, set its gradient, and then adjusted the hue to a darker tone.