So I am not sure what I am doing wrong but often I have spine bone, shouldr bone and than at least two in arms. Now for some reason I will have first bone rotating corectly and second bone (which should be it's child) bends the whole layer instead having anchor in a upper, parent bone. What is wrong here guys ?
Thank you
Looks like you accidentially used layer binding for the arm bitmap with the lower arm bone.
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1. Export the upper and lower arms as two separate images. Put on separate layers and then bind each to the corresponding bone. Also add a shoulder bone and make the upper arm bone a child of it, so the upper arm has a pivot point to rotate around.
2. If you prefer to keep your arm as a single image on a layer then select that layer and go to the Bone menu and choose "Use All Bones For Flex-Binding". Use the Bone Strength tool to adjust the bone strength settings (for each bone) to limit each bone's region of influence to the upper and lower sections of the arm. Your arm should bend at the elbow.