As a Krita Newbie I may need some help understanding some of the basics:

Using the most recent Windows version I created a text (purple) and used the layer style 'Outer Glow' (yellowish) with the result appearing just fine using a white (lower) background layer. However when I create another black background layer that sits in between the text layer and the white layer, the outer glow effect disappears entirely; only the purple text remains visible on the black background. Why would the outer glow show on the white background layer and not on the black one? I can't figure that out. Of course as soon as I switch the black background layer to 'hidden' the glow appears again against the lower white background layer.

None of the layers have alpha properties set, so it's a bit of a mystery to me; somebody can help me out? I can't attach a sample file to this post to illustrate this I guess ..

Any help appreciated!

On the 'Outer Glow' configuration, change the 'Blending Mode'.
Start with 'normal', then change it to your preference. the 'normal' blending mode should show up on any background color.

Thanks, that seems to do the trick