This guide provides essential information for a VFX Supervisor involved in a shoot for Wenneker.Amsterdam. This information is also beneficial for producers to understand the necessity of these actions on the set.
Below is a list of minimum requirements. Wenneker does have a own VFX kit for usage on set.
| Reflective Ball | Reference for light direction of the set |
|---|---|
| Grey Ball | Reference for light calibration of the set |
| Macbeth Chart | For colormatching plates and HDRI’s |
| Distance meter | To measure set or distances to objects/camera |
| Photocamera | To make reference images from the set or proudct |
| Laptop | To check and backup HDRI’s en other images |
| Theta Z | For creating HDRI/360’s pictures |
| Tripod | To put the Theta on |
| Notebook or App | To note lens data |
| Chargers | Check upfront if all batteries are fully loaded before shoot |
| Markers (pencils) | For tracking markers on product |
HDRI
When replacing a product in 3D, the 3D software needs input on the source of light and reflections. This can be simulated using an HDRI. The use of HDRI allows the 3D artist to establish an initial lighting setup and set reflections. The set should be as empty as possible to prevent the entire crew from being visible in the reflections.
REFLECTIVE/MATTE BALL
When shooting the High Dynamic Range Image (HDRI), you must also photograph the reflective and matte balls.
The reflective and matte balls serve as reference points for the 3D artist to match the lighting. The artist can use these to check if the colors on the actual set align with those on the digital set. Furthermore, the reflective ball allows for the correct positioning and rotation of the HDRI.
MACBETH CHART
When shooting the reflective and matte balls, the Macbeth chart must also be captured, either simultaneously or sequentially. Additionally, when shooting the HDRI, the Macbeth Chart must be included in the HDRI image. Ensure it is positioned between 50 and 200 cm from the 360 camera. If it's too close, it might cover too much of the frame; if it's too far, the colors may degrade into blurry pixels, rendering them useless.
Assume that everyone on set might overlook you and your 360 camera and balls. Prior to the shoot, inform the Producers and 1st AD, and in some cases the Director, that it is necessary to shoot the HDRI, balls, and Macbeth chart for every significant light change. Since it's unlikely that anyone will remind you, it is important to stay close and remain attentive.