I'm trying to create a stepped gradient with Photoshop from black to white made of vertical bands. I can more or less achieve this by using the posterize feature but the cut between colors is not neat.
Each time the gradient goes from one color to the next one, I get a line of another color. I have posterized the picture with 50 steps which means that I should only have 50 colors but when I check them programmatically I get 344 colors because of those lines.
Is there another way of creating a neat stepped gradient with Photoshop without the blur between the colors? Posterize with only 4 to 10 colors work but beyond that, I get a blur.
Is there another feature from Photoshop I should use?