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Shader Vector 3 color different from parameters Vector 3 color

Hello everyone. I have a weird result with the node "RotateAboutAxis" in my shader to move my particles mesh. I am trying to make a tree explosion that will stop in mid air. I have a decent result using the Z axis, the blue color. There is no movement in the particles, the vertexes are moved using the shader. I used random value to give every particles a different pivot position. I supposed I could use the particles color and generate random color to give every particle a different axis. But I did not get the results I wanted. So I did a test. I used a blue vector parameter from the shader as the axis, and got a good result. I used a blue vector from the particles colors and got a different and bad result. I must be missing something obvious, because, why does the two blue colors give different results. Here are the pics. alt text

alt text

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Product Version: UE 4.15
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asked Apr 12 '18 at 09:53 PM in Using UE4

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FrimaLance
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