Please need help with luminosity masks

[sekuko]

I'm new to photoshop (version 21.0.1) and trying to exposure blend with luminosity masks. However I get a strange pixelated effect.
I've created the mask for the top layer:

When I show only the top image I get this pixelated appearance (I want the top part of the image to show through):

When I paint with white on the mask I get the desired effect. Why doesn't it happen with the luminosity mask?:

What am I doing wrong? Please I need help. Thanks in advance

 

[hawkeye]

For masks, white reveals, black conceals. Grey will yield semi-transparency.
If you want the sky to show, paint the mask with white.

 

[sekuko]

Thanks. But isn't this supposed to happen automatically with luminosity masks ? I'm using TK panel basic.

 

[hawkeye]

Luminosity masks are used for masking tonal values. This will explain it:

Luminosity Masks: What They Are and How to Use Them

Need to brighten of darken part of an image and leave the rest intact? You need to learn about luminosity masks. Here's what they are and how to use them.

digital-photography-school.com

 

[IamSam]

Hello. Sorry that you're having issues.
It's really hard for us to offer help here when we have no idea how the luminosity mask was created. Stating that you are using a TK Panel is not much help.
A luminosity mask is still just a layer mask created by making a selection. If you are experiencing transparency, then you need to adjust the selection to include the desired pixels.

I'm using TK panel basic.

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