A combination of a transferring vehicle, a receiving vehicle and a machine vision-augmented guidance system (11, 111, 311, 411) for the transferring vehicle for managing the unloading of agricultural material from the transferring vehicle to the receiving vehicle, wherein: the receiving vehicle comprises a propelled portion for propelling the receiving vehicle and a container with a storage portion for storing agricultural material; a spout is operably connected to the transferring vehicle and adapted for transferring the agricultural material to the receiving vehicle; an actuator is configured for moving the spout to change the rotation angle of the spout with respect to the transferring vehicle around a vertical axis; an imaging device (10, 12) faces towards the storage portion of the receiving vehicle, the imaging device (10, 12) adapted to collect image data; and a container module is provided and adapted for determining the container position; wherein the container module is adapted to identify a container perimeter of the storage portion in the collected image data by identifying one or more edges of the container perimeter in the collected image data; wherein the imaging device is mounted on the transferring vehicle spaced from the spout, characterised in that a spout module (22, 122) is configured for identifying the spout of the transferring vehicle in the collected image data and to determine the position of the spout from the collected image data; the spout module (22, 122) adapted not to use a spout angle sensor for detecting an angle of the spout with respect to the transferring vehicle for estimating a position of the spout end relative to the storage portion, and that an alignment module is configured for determining the relative position of the spout and the container position based on the spout position and the container position by determining the difference between the spout position and the container position and configured for generating command data or user interface data for the receiving vehicle to maintain the spout and container in relative cooperative alignment or target alignment for transferring of material from the transferring vehicle to the receiving vehicle. the receiving vehicle comprises a propelled portion for propelling the receiving vehicle and a container with a storage portion for storing agricultural material; a spout is operably connected to the transferring vehicle and adapted for transferring the agricultural material to the receiving vehicle; an actuator is configured for moving the spout to change the rotation angle of the spout with respect to the transferring vehicle around a vertical axis; an imaging device (10, 12) faces towards the storage portion of the receiving vehicle, the imaging device (10, 12) adapted to collect image data; and a container module is provided and adapted for determining the container position; wherein the container module is adapted to identify a container perimeter of the storage portion in the collected image data by identifying one or more edges of the container perimeter in the collected image data; wherein the imaging device is mounted on the transferring vehicle spaced from the spout, characterised in that a spout module (22, 122) is configured for identifying the spout of the transferring vehicle in the collected image data and to determine the position of the spout from the collected image data; the spout module (22, 122) adapted not to use a spout angle sensor for detecting an angle of the spout with respect to the transferring vehicle for estimating a position of the spout end relative to the storage portion, and that an alignment module is configured for determining the relative position of the spout and the container position based on the spout position and the container position by determining the difference between the spout position and the container position and configured for generating command data or user interface data for the receiving vehicle to maintain the spout and container in relative cooperative alignment or target alignment for transferring of material from the transferring vehicle to the receiving vehicle.