Not sure why you're getting duplicates. Might be a VSS bug. I never really tested using an Image_Map in the template with a file assigned to it.

To calculate Bias(x, .2), where x is your Lip_Mask,

Add a Math node.
Set type to Bias.
Value_1 = 1 and plug in your mask (this is x)
Value_2 = .2 - the bias value.

Plug the Bias node into where the LIp_mask used to go.

To calculate Gain(x, .8), where x is your Lip_Mask,

Add a Math node.
Set type to Gain.
Value_1 = 1 and plug in your mask (this is x)
Value_2 = .8 - the gain value
Plug the Gain node into where the Lip_Mask used to go.

To calculate Gain(Bias(x, .2), .8) - do both.

First the Bias(Lip_Mask, .2). Then plug THAT into your Gain node Value_1. Then plug THAT into where the LIp_Mask used to go.

Going to bed now :)

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)