I read this thread yesterday and thought “mjeh perhaps I’ll try some time”. But tonight I remembered to do it in a LD 
Remembering what to do in LDs have been hard for me, but a while ago i found out that if i decide what i want to do and think about it every day i will most likely remember to do it in a dream within a week. 3 or 4 days ago i decided i wanted to play with rubiks cube in a dream which also occurred tonight. Lets start with the dream:
I was in a forest and saw a moose. I decided to do my RC, counting my fingers, i had 6 fingers. But i thought “this is too real to be a dream”, so i did the RC again, still 6 fingers! I thought the same thing again but the third time i became lucid. The usual “running around doing random things” happened for a while, until i found myself in my home and i remember “hey i wanted to play with rubiks cube!”. So i went into my room and took my cube from where I had put it and started to play with it. I just randomly scrambled it, I should have been more clear to myself and said “I want to SOLVE the cube” instead of playing with it.
Then i remembered the quest! I turned around and saw my shadow, perhaps for the first time ever in a dream. I dived into my shadow like you dive into a swimming pool. Upon jumping i unwillingly expected that i would hit the ground and slowly bounce off, which was just what happened. However, after I bounced off the ground, i appeared in a FA, not lucid 
When i “woke up” to the FA i found myself at about the same spot that i were when i dived into my shadow. Then i walked around in the house a bit and my mom told me it was in the middle of the night and that i had to go to bed. Then i woke up.
So what happened from diving into my shadow was that i appeared in a copy of my environment where it was night instead of day. It felt somehow like a FA probably because i lost lucidity.
In the dream i remembered the thread saying “dive into your shadow” so that’s what i did. I think I did the quest good enough, but I could have done it better by stepping into the shadow instead of diving, if that matters.
I don’t think I’ve ever succeeded to become lucid in a FA after an LD. If anyone got any hints or tutorials on how to do so please PM me.