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...re vibrant colours. My most recent attempt at doing this involved generating multiple rgb colours with transparency (alpha = 0.5) and then combining these colours using colorRampPalette(). I am able to use the resulting colour ramp, but it has no transparency. # Make terrain colour ramp rgb7 <- rgb(red=0, green=255, blue=77, alpha = 0.5, maxColorValue = 255) rgb8 <- rgb(red=26, green=255, blue=0, alpha = 0.5, maxColorValue = 255) rgb9 <- rgb(red=128, green=255, blue=0, alpha = 0.5, maxColorValue = 255) rgb10 <- rgb(red=230, green=255, blue=0, alpha = 0.5,...