Visual and special effects require an on-set supervisor who coordinats the making of all the technical elements that will be fundamental for the creation, in digital post, of the final effect. Without this person it often happens that during post production the work needed is much more complex and expensive, and this could have been avoided by an accurate coordination. VFX supervisor ensures a perfect flux starting from pre-production (with cost estimates, together with the VFX producer) to the final product and film edit.