i am a learning electric/computer engineer with lessons in chemical and material science.
My list of preferred materials is as follows:
Mud 60%^1
slime 20% (pref clear/thick)
Food wam 5%
Other 15%

^1(subcatagory:mud)
peat 5%, Decomposed Plant matter 5%, clay 17%, Muck 30%, Estuary mud 9%, silt 2%, slurry 20%, Sedimentary River clay 11%, Misc 1%

I am very particular and often get hung up on semantics, I like getting filthy, I like the thickness of mud, I like natural stink smell of mud and sulfur,