Dead tree

Roel, I like the idea here and find the capture as an abstract works nicely. The larger version provides a good look at the texture and overall wood grain patterns really well. This really does show a great aging of the wood to say the least.
There are areas of lost DOF, but not so much it is overly distracting. The stacking you did kept that issue to a minimum. I might try a very slight boost in contrast / saturation for another look, but still works as is too. Nice image overall.

Very nice lines and textures Roel. The stack looks pretty good, but the ULC is still a bit soft. I think you could boost the contrast a bit here, but that is a personal preference of mine.

Very nice image Roel. I like the textures and tones a lot. Also the curves in the image. I agree about a little more contrast. But very nicely done.

The curves and texture are very strong here. To help enhance those characteristics, I would suggest a B&W conversion with some added contrast to make this shot all about texture and form.

I think you captured something with a lot of interest and did a nice job compositionally. I it were mine I think I would open the shadows a bit and possibly a little pop of contrast would strengthen this. I am wondering why you used f/20 for a focus stack. I usually use f/8 (assuming that is the sharpest point of the lens) when I am focus stacking??

Thanks for the reactions everyone! Lots of interesting suggestions to play around with!

Nick, I usually use around f/8 as well for focus stacks, but this picture was taken with wet clothes and not the warmest weather (I fell in some water just before....) which might have caused me to do things a bit more quickly than normal, hehe. So in short, I made a small mistake!

Roel

I like the composition and texture, but my eye gets stuck on the tiny brown leaf fragment that is dead center. Agreed that this would be fun to see in B&W.