[Carrara]IK Problem: What I see is NOT what I get - Polyloop

DaveH · 19th October 2007, 23:48

Hopefully the pictures will explain it all.

The good picture is what I see when animating and when I render a single frame.

The bad picture is what I get when I batch render the sequence.

The IK chains run from the base of each arm segment to the next branch or tip, depending on where in the arm the IK chain is. In the "good" picture I've sketched IK chains in pink. The IK chains have several joints, the number of which depends on the segment length: from 3 or 4 to about a dozen. Also, all joints are aligned the same. The end of each chain points at a locator, and the locator is also aligned with the direction of the tip of the chain. That's why in the "bad" picture the fork points up - it's aimed to flow from the IK chain that feeds it.

How do I make it calculate the bend consistently? Better yet, what n00b mistake have I made, and how do I fix it?

Thanks in advance for any advice.

Wesgraphics · 20th October 2007, 02:54

Don't know, not sure what I'm looking at there.

I do know you cannot do any modification of the mesh after it is skinned or it will give unpredictable results.

DaveH · 20th October 2007, 04:45

Well, yes and no. Things work OK if you detach the mesh from the rig, modify the mesh, and then reattach.

What you're looking at is a neuron, with rigging in the tendrils. Here's the wireframe with the rig peeking through:

19th October 2007, 23:48	#1 (permalink)
DaveH Spline Join Date: Sep 2007 Posts: 44	[Carrara]IK Problem: What I see is NOT what I get Hopefully the pictures will explain it all. The good picture is what I see when animating and when I render a single frame. The bad picture is what I get when I batch render the sequence. The IK chains run from the base of each arm segment to the next branch or tip, depending on where in the arm the IK chain is. In the "good" picture I've sketched IK chains in pink. The IK chains have several joints, the number of which depends on the segment length: from 3 or 4 to about a dozen. Also, all joints are aligned the same. The end of each chain points at a locator, and the locator is also aligned with the direction of the tip of the chain. That's why in the "bad" picture the fork points up - it's aimed to flow from the IK chain that feeds it. How do I make it calculate the bend consistently? Better yet, what n00b mistake have I made, and how do I fix it? Thanks in advance for any advice. Attached Thumbnails

20th October 2007, 04:45	#3 (permalink)
DaveH Spline Join Date: Sep 2007 Posts: 44	Well, yes and no. Things work OK if you detach the mesh from the rig, modify the mesh, and then reattach. What you're looking at is a neuron, with rigging in the tendrils. Here's the wireframe with the rig peeking through: Attached Thumbnails Last edited by DaveH; 20th October 2007 at 04:46. Reason: forgot attachments

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

20th October 2007, 02:54	#2 (permalink)
Wesgraphics Please, check your email!!! Join Date: Aug 2007 Posts: 78	Don't know, not sure what I'm looking at there. I do know you cannot do any modification of the mesh after it is skinned or it will give unpredictable results.