@tempy
You could try the gimp_gmic_qt plugin, http://www.gmic.eu There are Win installers for both Gimp 2.10 and Gimp 3
Using the gmic Lights & Shadows section -> Illuminate 2D shape
Makes a semi-transparent overlay to give a depth/light effect.
or
That is illuminate mode. There is another mode which will make a bump map for you to apply manually.
You could try the gimp_gmic_qt plugin, http://www.gmic.eu There are Win installers for both Gimp 2.10 and Gimp 3
Using the gmic Lights & Shadows section -> Illuminate 2D shape
Makes a semi-transparent overlay to give a depth/light effect.
or
That is illuminate mode. There is another mode which will make a bump map for you to apply manually.