It’s working!!!
Adding the “BP_EasySnowMask” to the Sequencer, keyframe the “Custom Snow Mask Edge Falloff” and “Scale”, than add the “Material Parameter Collection” used by the “BP” to the Sequencer and paste the same keyframes again to the “Custom Snow Mask Edge Falloff” and “Scale” of the “MPC”
it’s rendering!
(the “Scales” has to be done manually because the “BP Scale” is XYZ and the “MPC Scale” is RGB)
I’m pretty noob with UE, but I guess it’s something about kind of Priority between BP and Sequencer, I’m not 100% sure about that because I don’t know how to verify this theory.
I’m using UE 5.5.4