Conventional visualization process encompasses three rounds of previews:
The first round of gray-scale images, where we check if the geometry of the visualized object is correct and all small details are in their rightful place. Here all the model changes are to be made.
Second round is already rendered with desired lighting and background. At this stage 90% alterations of the overall picture take place.
Third round where we have 90% of the result and only minor adjustments can be introduced.
Surely, if more preview rounds are needed, this can be negotiated and settled. We would be happy to do everything in our power to deliver the perfect result.