had a look at sonshine's one cloud tgc. this both inspired me and reminded me of something posted long time ago, the 'ring clouds' technique and its way of masking/blending.
tried to 'combine' the ideas in the most basic way, without many nodes or extra images etc.
nothing special, just 2 nodes, nice effect, simple is gooood
thanks to sonshine and njen for giving me the idea
