Solved-(The Fix): I was taking the M2, SKIN, and ANIM files from the wrong MPQ (patch.mpq) so i was getting out of date files instead of getting the newest ones from Patch-2.MPQ.
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I have been trying to edit models in 3.3.5a with Blender 2.4...here are the steps i take.
Extract the original .M2/SKIN files
Use M2mod3 to convert those to .M2i
import into blender>make my edits>export as .M2i
run through M2mod3 again to merge (original.M2+Edited.M2i)>New.M2
then i use Ladik's MPQ editor to make my custom MPQ, making sure file paths are correct.
put my MPQ in the data folder
log in, see that my edits have been applied to player characters correctly in toon selection screen.
play character, type in an emote that causes movement /dance, /sit, /sleep.
and then polygons/faces freak out and game crashes...or even talk to npc to get quest.
i have tried skipping editing the models in blender to see if its something i do to them. But using the (original.M2+Original.M2i)>New.M2 still crashes the game...so i think my problem is within my converter.
I have done these EXACT steps with M2modv4 and v4.5 with Blender 2.6 to produce edited models for 4.3.4 with absolutely NO problems...no crashes or anything.
Do Wrath models take an extra step or 2 to make them usable in-game?
Thanks in advance for any help i can get with this. A known working 3.3.5a M2mod link would also be appreciated.