Votes
0
Product:
iClone 8
Version:
8.63
Status:
Active
Issue 12389
Spring effects cannot be reliably disabled when using Edit Motion Layer
I am encountering an issue related to the following system message in iClone:

“This object contains spring effects. You can disable the effect by adding an OFF key in the spring track before using the Edit Motion Layer tool.”

I have already tried disabling the Spring effect exactly as recommended — by adding an OFF key in the Spring track before using the Edit Motion Layer tool.

However, the result is inconsistent:

In some cases, this method works as expected.

In most cases, the Spring effect still seems to influence the object, and the issue persists even though the OFF key is present.

Please advise whether this is a known issue, a limitation of the Spring system, or if there is an additional required step to completely disable Spring effects before using Edit Motion Layer.
OS: Windows 11
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Bug
Submitted bykoshkin24
1
COMMENTS (1)
Feedback Tracker Admin 
Hi koshkin24,

Regarding the issue where Spring effects cannot be reliably disabled:

We suspect this behavior might be related to the specific motion data or how the Spring state is being toggled. You can try the following operations to see if the results match your expectations:

1. Check the Modify Panel Settings
    You can explicitly control the Spring status in the Modify Panel. Navigate to the Spring section, where you can manually toggle the effect ON or OFF to ensure the global state is correct.

2. Check for "Baked" Motion Data
    If you feel the "OFF" key is ineffective, it is possible that the Motion clip itself already contains animation data for those specific spring bones.
    If the motion clip drives those bones (e.g., hair or cloth bones were keyed in the source animation), the object will still move even if the Spring physics is turned off.

Suggestion: You can try applying a different Motion clip (one that doesn't animate those specific parts) to see if the Spring toggle works as intended.

3. Timeline Verification
    To clearly distinguish the effect, you can try setting up the timeline as follows:

       Go to Frame 0: Set Spring to ON.

       Go to Frame 100: Set Spring to OFF.

       Apply a motion that spans this range and play it back.

Please check if the Spring physics stops calculating after Frame 100 as expected.

Best regards,
Kayla
Reallusion
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