Making star background

[Dell Gross]

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

Photoshop 22.5.1

[Peru Bob]

I've moved this from the Using the Community forum (which is the forum for issues using the forums) to the Photoshop forum.

[Dell Gross]

Will any replys be diected to my post, or will they be in the photoshop forms?

[Leslie Moak Murray]

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

[Dell Gross]

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]

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