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Old 31st Mar 2012, 08:45 PM   #1
sparten gage
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Default LightWave - problems with lightwave

whenever i use the Lightwave bones tool on models the arms it warps the body stretching and distorting it. How can i stop this



thats without movement



thats after i move the arm.if anyone know how to get it to stop doing this please help me
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Old 31st Mar 2012, 09:43 PM   #2
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Hi sparten gage;

There are two ways to solve this issue.

The first is to select the bone in the arm, the press P for Properties. About halfway down you will see an option called Multiply Strength By Rest Length; make sure that is check marked. This will Lightwave that the bone is only to affect the part of the mesh within range of it's rest length. However, that can still produce undesired results when the arm bone is too close to the body part of the mesh.

The second way to do it is to create weight maps. You select the polygons that make up the upper arm, then go to the Map tab and select New Weight Map, name it something clever like Left Arm Upper. Then select the polygons in the left forearm and make a weight map. Select the polygons in the torso and give them a weight map. Then go into the bone properties and look for the drop down menu that lets you select the weight map for that bone. If you are editing the Left Upper Arm bone, tell it to use the Left Upper Arm weight map. Then it will only move the polygons associated with that weight map.

To get good deformations at the joints with weight maps, however, you need to create joint morphs.

If at all possible try to obtain the Newtek video tutorials Rigging In Lightwave from their site. It explains it in detail.

Also, read the part of the manual about IK Booster; it's a tool to help you create a skeleton of bones in a character.
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Old 31st Mar 2012, 11:17 PM   #3
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I've tried weight maps before and they haven't done anything and it seams that the rest length isn't helping me.


i fixed it and i don't know how to delete posts
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Old 3rd Apr 2012, 12:06 PM   #4
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any chance i could see your bone setup?

some "rib" bones might solve/help you with this ie adding some extra bones where the arm bones are deforming the torso...

also a weight map would def solve this but you also have to tell the bones to use the weight map.

Edit: just saw that you said you fixed it... nevermind..
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Old 3rd Apr 2012, 01:29 PM   #5
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Here ya go...

http://forums.newtek.com/showthread.php?t=77002

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i use em all the time
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Old 4th Apr 2012, 08:53 AM   #6
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No need to delete the posts. We have lots of storage space!

I'm glad you got it working. Rigging can be very frustrating and it's a great victory when it works.
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Old 16th Apr 2012, 02:56 PM   #7
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don't i know it
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Old 12th Jun 2012, 08:27 AM   #8
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Quote:
Originally Posted by sparten gage View Post
I've tried weight maps before and they haven't done anything and it seams that the rest length isn't helping me.


i fixed it and i don't know how to delete posts
After creating weight maps you will have to assign the weightmap to the bone in Layout in the bone properties. That way your weightmap should limit the bone's influence to the weightmap only.
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