yesbird

Sorry for the late reply and many thanks for the assistance, the scene file opened without problems. Right now I am catched by a completely different project, but I will get back to this soon and then will check how it works. All the best.

Thank you for your reply, but unfortunately the scripting approach is not working - result is the same. The only solution I found is setting start of dynamics at -1 frame, but after exporting to GLB (I am working with Three.js) joints become twisting unpredictably and only protection fixed them (please see image). But the problem is still not solved, as in GLB I have the same picture as described - completely straight fish tail and small lag. This will drive me crazy ...

Greetings ! This is my first post here, so I want to say thanks for supporting this forum and hope for community assistance. I am new to the C4D animation system and stuck on a simple thing - smooth animation loop. According to all suggestions, I made the same keys in the first and last frame (Y_Rotation = 0), set Repeat for Before and After properties. Despite that after the last frame I see small lag and finaly whole movement is not smooth. After few experiments I found that the reason is enabled Dynamics in IK tag - at the end of the loop it resets and all joints chain becomes straight and aligns to the Z axis. Could you please help me to avoid this behavior ? I am using C4D R19, scene file is here. Thanks is advance.