There was a very philosophical discussion in another thread on the nature, or lack thereof, of the dwarven buttocks. How would I mod one in?
So... the buttcheek would be a bodypart like EAR, but on upper leg. No you can't force it to be BEHIND the creature.
Here are some related bodyparts from a great mod:
(_protected variants so they're under armor. empirical testing reasons.)
[BODY:MALEGEN_PROTECTED]
[BP:PN:phallus:STP][CONTYPE:LOWERBODY][SMALL][LEFT][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:11]
[BP:RTS:right testicle:STP][CONTYPE:LOWERBODY][SMALL][RIGHT][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:6]
[BP:LTS:left testicle:STP][CONTYPE:LOWERBODY][SMALL][LEFT][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:6]
[BODY:FEMALEGEN_PROTECTED]
[BP:CR:crotch:STP][CONTYPE:LOWERBODY][SMALL][EMBEDDED][APERTURE][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:14]
[BP:WOM:womb:STP][CONTYPE:LOWERBODY][SMALL][INTERNAL][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:10]
[BP:ROV:right ovary:STP][CONTYPE:LOWERBODY][SMALL][INTERNAL][RIGHT][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:10]
[BP:LOV:left ovary:STP][CONTYPE:LOWERBODY][SMALL][INTERNAL][LEFT][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:10]
[BODY:MALEGEN]
[BP:PN:phallus:STP][CONTYPE:LOWERBODY][SMALL][LEFT][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:11]
[BP:RTS:right testicle:STP][CONTYPE:LOWERBODY][SMALL][RIGHT][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:6]
[BP:LTS:left testicle:STP][CONTYPE:LOWERBODY][SMALL][LEFT][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:6]
[BODY:FEMALEGEN]
[BP:CR:crotch:STP][CONTYPE:LOWERBODY][SMALL][EMBEDDED][APERTURE][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:14]
[BP:WOM:womb:STP][CONTYPE:LOWERBODY][SMALL][INTERNAL][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:10]
[BP:ROV:right ovary:STP][CONTYPE:LOWERBODY][SMALL][INTERNAL][RIGHT][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:10]
[BP:LOV:left ovary:STP][CONTYPE:LOWERBODY][SMALL][INTERNAL][LEFT][CATEGORY:GENITALIA]
[DEFAULT_RELSIZE:10]
[BODY:UDDER2N]
[BP:UD:udder][CONTYPE:LOWERBODY][SMALL][CATEGORY:TENTACLE]
[DEFAULT_RELSIZE:90] --smaller than heart
[BP:1N:first nipple][CON:UD][SMALL][EMBEDDED][RIGHT][CATEGORY:PANCREAS]
[BP:2N:second nipple][CON:UD][SMALL][EMBEDDED][LEFT][CATEGORY:PANCREAS]
[BODY:UDDER4N]
[BP:UD:udder][CONTYPE:LOWERBODY][SMALL][CATEGORY:TENTACLE]
[DEFAULT_RELSIZE:120]
[BP:1N:first nipple][CON:UD][SMALL][EMBEDDED][RIGHT][CATEGORY:PANCREAS]
[BP:2N:second nipple][CON:UD][SMALL][EMBEDDED][RIGHT][CATEGORY:PANCREAS]
[BP:3N:third nipple][CON:UD][SMALL][EMBEDDED][LEFT][CATEGORY:PANCREAS]
[BP:4N:fourth nipple][CON:UD][SMALL][EMBEDDED][LEFT][CATEGORY:PANCREAS]
[BODY:2BREASTS_PROTECTED]
[BP:RB:right breast:STP][CONTYPE:UPPERBODY][RIGHT][SMALL][CATEGORY:PANCREAS]
[DEFAULT_RELSIZE:38]
[BP:LB:left breast:STP][CONTYPE:UPPERBODY][LEFT][SMALL][CATEGORY:PANCREAS]
[DEFAULT_RELSIZE:40]
[BODY:2BREASTS]
[BP:RB:right breast:STP][CONTYPE:UPPERBODY][RIGHT][SMALL][CATEGORY:PANCREAS]
[DEFAULT_RELSIZE:38]
[BP:LB:left breast:STP][CONTYPE:UPPERBODY][LEFT][SMALL][CATEGORY:PANCREAS]
[DEFAULT_RELSIZE:40]
[BODY:D_4FACE_TENTACLES]
[BP:RUTENT:first right face tentacle:STP][CONTYPE:HEAD][CATEGORY:TENTACLE][SMALL][RIGHT]
[DEFAULT_RELSIZE:6]
[BP:RLTENT:second right face tentacle:STP][CONTYPE:HEAD][CATEGORY:TENTACLE][SMALL][RIGHT]
[DEFAULT_RELSIZE:6]
[BP:LUTENT:first left face tentacle:STP][CONTYPE:HEAD][CATEGORY:TENTACLE][SMALL][LEFT]
[DEFAULT_RELSIZE:6]
[BP:LLTENT:second left face tentacle:STP][CONTYPE:HEAD][CATEGORY:TENTACLE][SMALL][LEFT]
[DEFAULT_RELSIZE:6]
Hrm.. Not quite what I was going for, though it was a good jumping off point.
In the body plan, I made an additional limb that connects the lower body to the upper leg, which has no bones and excess fat.
In body_default.txt, I added the following to [BODY:HUMANOID_NECK]
[BP:RBC:right buttcheek:STP][CONTYPE:LOWERBODY][CON:RUL][LIMB][RIGHT][CATEGORY:BUTTCHEEK]
[DEFAULT_RELSIZE:500]
[BP:LBC:left buttcheek:STP][CONTYPE:LOWERBODY][CON:LUL][LIMB][LEFT][CATEGORY:BUTTCHEEK]
[DEFAULT_RELSIZE:500]
In b_detail_plan_default.txt, I added the following to [BODY_DETAIL_PLAN:VERTEBRATE_TISSUE_LAYERS]
[BP_LAYERS:BY_CATEGORY:BUTTCHEEK:ARG3:25:ARG2:10:ARG1:1]
This hit all requirements but the "required to stand". It was even covered by armor! The last requirement seems like a doozy, though. Any suggestions?
Edit:I would also like a "body part appearance modifier" (flat as a pancake -> ginormous). Are there quality RAWs?