I have an IK and a FK chain that I wanted to blend into the result one with a blend colors node. I saw this method was preferred over constraints due to its speed. I had FK rotation as my first input and IK rotation as my second and then the output would go in the result chain rotate. Every time I would set a connection between the nodes, I could see my joints slightly shifting position which caused them to not be aligned anymore and at the end, nothing would work, the rotation of the result chain wouldn't cause any movement.
I had cleared my joints history beforehand and froze their transformations. When I would try to do the same for translation, at the end the rig would be broken in all three chains at 45 degrees from each other, stretched on the ground plane.
Does anyone know what I could have done to prevent this or what went wrong? Thank you!