Thank you Maximilian. Few minutes after I started, I was starting to feel it may not work but pulled through it with rather more experimentation of how to texturize and distort the wallnut than with technique which I unfortunately lack. I do have a self-invented/discovered technique for making shadows though.
The plugins, Cloud, Shape3D, Levels, Vibrance, Liquify, Smudge, Sharpen and Grain,did it for me. Luckily, "still life" is an art form I used to sketch way back in highschool.