var bone0 = bones[(int)v.BlendIndices[0]];
var bone1 = bones[(int)v.BlendIndices[1]];
var center = v.SdefC; // Vector3
var weight0 = v.BlendWeight[0]; // float
var weight1 = 1 - weight0; // float
var mat = Matrix.RotationQuaternion(Quaternion.Lerp(Quaternion.Identity, bone1.LocalRotation, weight1) * Quaternion.RotationMatrix(bone0.AbsoluteTransform)); // Matrix
var pos = v.Position; // Vector3