Since I harvested four deer last year I decided to try to tan the hides. I have never done this so I just read some instructions about alum tanning. I fleshed it, removed the membrane on the flesh side, took the fur off it in a lye solution and then tanned it and worked it soft. It seemed to be fine but then I read where in addition to removing the hair you should grain the hide as well. This means removing the membrane on the fur side. I did not do this and it seemed to tan out just fine. My question is what are the consequences of not graining the hide before tanning. I could attach a photo if I could figure it out.