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Hello Eduard and others ! There is an issue I run in while animating "Cracks". I am using direction modifiers "Noise_dir" to keep it natural (even if the client maybe will prefer straight lines, then the problem would be gone..). If I don't use variable "strength" parameter, then the animation is just fine, but the branches won't start from the "trunk" immediately but randomly offset. If I use variable "strength" parameter with a rising curve, then all branches start from where they should, but animating the tree-crack this parameter seems to scale to the length of the actual branch - so every crack is changing its shape while growing. The same is true for children branches, the start to jitter as the parent branch changes. This would be no problem for a real (timelapse) growing tree or plant, but in my case a grown crack (inside of a rock for instance) can never change its shape. Is anyone aware of a quick solution? I hope I could be clear enough to describe my problem. I attached a test file with a Trunk and four child branches. Inside of B_01 I disabled the "Strength" graph of the Noise_dir modifier, the others have the graph enabled. You can quickly see the issues an differences. I tried to lower "Step" size continously as there are similar issues when the steps are to large. Thanks! andreas 02_Crack_2D.max