This may be a silly question, but here goes. Is it normal for the penis in the flaccid state to change texture. Sometimes my penis in the flaccid state is soft and long and sometimes its as hard as a rock and short.  Is the scar tissue causing this?

Greetings,

You pose your question asking about the flaccid state of your penis presenting different textures, and present your observations that seem to be contradictory. 

You mention one state is soft and long, and the other is hard and short.   This last description sounds very much like an erection that is  shortened because of the inability to lengthen due to contraction of the penile soft tissue, and not another state of a flaccid penis.  It is not consistent to say that you are both flaccid and hard as a rock.   For the most part, you are either soft or hard, flaccid or erect, but not at the same time. 

The erection process is complex and the presence of the Peyronie's plaque or scar, a foreign mass of collagen tissue situated within the erectile tissue, can created some unusual reactions and alternations of the usual erection a man can experience.

I think perhaps what you are confusing is the lack of lengthening of your erect Peyronie's penis with still being flaccid.  TRH