Methods and apparatus for creating additional affine candidates. Virtual and temporal candidates are determined using neighboring spatial and temporal sub-blocks. The sub-blocks are examined in an order known to both an encoder and a decoder. Valid sub-blocks are used to compute an affine model. The candidates can be filtered and added to a candidate list conditionally based on various criteria. The candidates can be used to determine control point motion vectors and a motion flow field can be determined. Motion vectors for sub-blocks within a video coding block can be determined. Motion compensation can be performed using the improved affine candidates and encoding/decoding based on the improved affine motion compensation.