First one is: http://klepbankonline.nl/wp-content/uploads/klepbank-online.png
Image watermark is working, but the dark letters where not looking good on the dark picture, but here you see that your plugin is working: http://klepbankonline.nl/wp-content/uploads/klepbank-bram-klepbank-wit-brocante.jpg.
So, because of dark letters in combination with dark picture, I changed the PNG file and changed the dark letters to white letters, see http://klepbankonline.nl/wp-content/uploads/klepbank-online-watermerk.png.
Now, the Image watermark is not working anymore, see this bad result:
The most basic answer is: png image with white letters is not transparent (it has black backround). You should export the png file without it, exactly as you did for a watermark with dark letters and then use it to watermark your image.
You should export the png file without it, exactly as you did for a watermark with dark letters and then use it to watermark your image.
If you mean I should use the image with dark letters instead of the white letters, that’s not an option because the dark letters dissapear because of the dark background of the image.
Anyway, you say the PNG with white letters has a black background, but when I place the same PNG image on the same picture in GIMP, everything looks fine (no black background, no double hazy logo like with the plugin). Ofcourse I want it to work with you plugin so I don’t have to do all manually!