Here is the first in a proposed set of 3 tutorials on the use of GMIC light rays filter.

The first set (attached below) is in 3 parts as follows:
1.a discussion of the parameters and behaviour of the filter
2.a tutorial using default parameters for a single set of rays on a single centred object
3.a tutorial on applying custom parameters to a single off set object with 2 sets of rays

As usual, proof reading my own words is beyond me, but if people find errors or inconsistencies, please let me know and I will correct them.

The second set will address multiple light rays across multiple objects and should be available in a few days.

The third set, hopefully ready by next week, will cover more complex usage with multiple light rays and creation of shaped objects/images using 'paths' and a 'layer mask' equivalent to produce, direct and focus the light rays as desired.

The first tutorial set will create the following images in a guided step by step process suitable for GIMP neophytes -

many thanks OMG
my (a bit heretical) result

another outcome, again on style 1 (the one I like)

Fantastic outcomes from the tutorial. Well Done Dinasset!
I posted mine in the other thread. Sorry.

a new one, combining two

I really love the tutorial, OMG! You really presented it in a way that the most inexperienced could follow you, but then took it further. Thank you very much.
Here are my attempts:

Thank you so much, I hope to get some play time soon to work on this.

another one

last one for now

Pat, Dinasset, you did beautiful results. Congrats!

Beautiful, Issabella. I really like it.

Hallo the Madonna remind on tutorial "Photoshop: How to Make an Illuminating, Religious Icon or Painting of Someone" I try simulate with self make Star bushes this even better.