Static and dynamic objects ? Not sure what you mean here!
There was qyute a good tutorial on swapping weapons in the tutorial section, but I will run briefly over the steps here.
1) Load up the CAS file into Max using V's max script
2) You should see the model and the weapons / shields all showing up. Assuming you loaded the texture as well, they should be textured.
3) Delete the model bits you don't want.
4) Now, save the Max file of your figure with no weapons/shields
5) Import the model which has the shiled you want, delete everything except the shield and save as 'shield' etc. Do the same for the sword.
6) Open up your soldier model, and merge in the sword and shield.
7) You are going to have to re-map the textures, since each model only uses 1 texture for it's UV mapping, and your new sword and shield are not on the same one as the soldier. You must sort this out.
8) Attack the sword to the right hand ( making sure it is named primary weapon ) and the shield to the left hand. They must be attached to the relevant hand bones for them to work correctly.
9) Export your CAS file and you are done
Bookmarks