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xuchenw20207367
Participant
August 1, 2020
Question

Posterization Layer

  • August 1, 2020
  • 3 replies
  • 212 views

Hello all,

I'm watching on a tutorial abt posterization. In course, it says that if I just set the colour number to 4, there will be 16 colours in the outcome, cos the posterization have 4 values in each channel, which is understandable.(As shot 1)

To solve it, adding a black and white layer between the posterize layer and the photo will do.(Shot 2)

But I just don't know why sandwiching the b&w layer will help solve it.

 

Wally

This topic has been closed for replies.

3 replies

c.pfaffenbichler
Community Expert
c.pfaffenbichlerCommunity Expert
Community Expert
August 1, 2020

Your description seems confusing: You mention four Channels so that would rule out RGB, but the Black & White Adjustment is not available in CMYK. 

c.pfaffenbichler
Community Expert
c.pfaffenbichlerCommunity Expert
Community Expert
August 1, 2020

»But I just don't know why sandwiching the b&w layer will help solve it.«

Solve what? What is the problem here? 

jane-e
Community Expert
jane-eCommunity Expert
Community Expert
August 1, 2020

Hi Wally,

Continue watching. Julianne Kost explains it a little later than where you are and adds a Gradient Map for the colors (as well as a Curves Adjustment layer for the shrubs). Also note that there is a Q&A on LinkedIn Learning where the instructor answers questions.

~ Jane

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