Making star background

Forum|Forum|4 years ago
October 4, 2021
3 replies
419 views

add noise than use levels to make star background look fine until I apply levels turns gray noise

Photoshop 22.5.1

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Leslie Moak Murray

Community Expert

I'm not sure what the question is. Was part of it cut off? Is there a screenshot?

D

Dell GrossAuthor

Participant

I have a 12x12 300 dpi image that I'm trying to add a star background. I make a black layer above my original image, add noise to the black layer than use the levels adjustment to define the stars. Looks good in the preview for the levels adjustment until I hit ok. The results are as if I didn't add the adjustment layer.

davescm

Community Expert

View before and after at 100% zoom.

The preview on a noise layer will be incorrect as pixels are combined together before applying the levels adjustment levels to the preview.This means that grey levels are introduced before applying levels.

With 100% zoom where 1 image pixel maps and to 1 screen pixel, the preview of the adjustment will be correct. If your noise is pure black and white pixels then the gamma control in levels is going to have no effect as it only affects grey pixels.

Dave