I think this is the shadow+fog issue:
panda3d.org/forums/viewtopic … 8525#78525
The cause of that was that my poor ol’ gpu can handle only 4 texture stages. Fog uses #1, shadows #2 and I had a colour texture (#3), a normal map texture (#4)and a gloss texture (#5). Removing the gloss (or merging it with the normal map) solved the problem.
As far as parallalax maping goes that always looked like that for me, but I blame my gpu, not panda:
