How to export overlay glow

Question

i made the following image:

this gives me a nice glowing effect, which i would like to export to transparent PNG. but when i set the black layer to invisble the glow is gone.

enter image description here

isnt my description clear enough? – clamp Sep 6 '14 at 17:19 — clamp, Sep 6 '14 at 17:19

Rosenthal · Accepted Answer · 2014-09-06 17:59:58Z

The problem is not Gimp is the algorithm used to Overlay the layer which depends in Light and Dark colors.

So, to get the effect you want follow this steps:

Go to the layers stack > Right Click > Click Merge Visible Layers

enter image description here

Click Merge

enter image description here

Go to Layer > Transparency > Color to Alpha

enter image description here

Select Black in the Color to Alpha Color Picker > Click OK (Two times)

enter image description here

Result:

enter image description here

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