Visual Effects Practical and On-Set VFX 2

Question 1

What is 'wire removal' in VFX post-production?

Accepted Answer

Digitally erasing the wires and rigs used to perform practical stunts from the final footage

Answer

Wire removal is the VFX process of digitally erasing the support wires, harnesses, and rigging used to perform practical stunts or support props, making the effect look completely unassisted.

Question 2

What does 'set extension' mean in VFX?

Accepted Answer

Digitally expanding a physical set beyond its real boundaries using CG or matte paintings

Answer

Set extension is a VFX technique where a partial physical set is augmented with digital elements—CG models, matte paintings, or composited footage—to create the illusion of a much larger or more elaborate environment.

Question 3

What is a 'gray ball' and 'chrome ball' used for on a VFX film set?

Accepted Answer

Reference spheres photographed on set to capture lighting information and reflections for matching CGI lighting

Answer

A gray ball (diffuse reference) and chrome ball (mirror reference) are photographed on set to capture the exact lighting conditions and reflections, giving VFX artists accurate data to match CGI lighting to the real environment.

Question 4

What is 'HDRI' and why is it used in VFX lighting?

Accepted Answer

High Dynamic Range Image — a 360-degree photograph used to illuminate and reflect on CGI objects

Answer

HDRI (High Dynamic Range Image) is a 360-degree panoramic photograph that contains a wide range of light values, used to realistically illuminate CGI elements with the same light that exists in the real scene.

Question 5

What is 'match-moving' (camera tracking) in VFX?

Accepted Answer

Analyzing footage to extract the camera's exact movement so that CG elements can be locked to the real camera's path

Answer

Match-moving (camera tracking) analyzes the movement of on-screen tracking markers or natural features to reconstruct the camera's exact position and movement in 3D space.

Visual Effects Practice Test

Visual Effects Practice Test

Visual Effects Practical and On-Set VFX 2