NMIXX 'KNOW ABOUT ME' Music Video Production Case Study

As a company specializing in LiDAR scanning and matchmoving, 75mm Studio was responsible for technical support required for the overall VFX of the chroma set during the production of NMIXX's "KNOW ABOUT ME" music video.

Interview with BGLOW Supervisor Kim Yuna on LiDAR-based Matchmove

Q1. What was the reason or necessity for introducing LiDAR-based matchmove service in this project?

A1. It was necessary because we could set up an precise sense of space in advance before receiving the cuts from production.

Q2. How did you proceed with matchmove before, and what difficulties did you face in that process? What was the biggest difference you felt when using LiDAR?

A2. Previously, we roughly matched the scene size, and since small errors existed in each cut, we needed a process to adjust them later. However, by establishing the base with LiDAR data first, I felt a big difference in that there was no need to change the scene size.

Q3. Were there any specific achievements, such as time savings or overall efficiency improvement, gained by utilizing LiDAR data?

A3. Although the cost might be higher, we could save time, which consequently secured time to improve quality.

Q4. What do you think is the key strength of this service? Please also explain why the combination of LiDAR and matchmove was effective.

A4. The biggest strength is saving time and securing continuity between cuts.

Q5. Do you plan to introduce this service in other future projects? If so, what type of projects do you think it would be most useful for?

A5. We plan to continue introducing it for projects that involve set CG work.

Q6. If you have any other comments you would like to leave freely, please let us know.

A6. Everyone at the 75mm Studio team was very kind and attentive, and they were truly wonderful people.

Progress Details

• Chroma Set On-site Marking (Tracking Point) Setup
• Building Precise Set Data through High-Precision LiDAR Scanning
• Providing Data Immediately Usable for VFX through Matchmove Work

Work Process and Effects

In advertising and music video production sites where schedules are very tight, agile and flexible response is essential within a short time to accurately record the placement of objects and components on site. High-precision LiDAR data secured in such an environment provides powerful efficiency in the post-production stage.

In particular, LiDAR data is highly accurate with an actual measurement error of within 3mm, ensuring high reliability as Survey data. This allows multiple workers to maintain the same reference point and consistent environmental data even when working on multiple matchmove shots in parallel. As a result, each worker can maintain a consistent scene scale and directionality, minimizing registration issues between scenes.

(Case of LiDAR Scan & Matchmove conducted by 75mm Studio for BTS CM)

Since downstream VFX tasks such as 3D modeling and lighting can be preceded based on LiDAR data, there is no need to wait for the completion of matchmove data. Because pre-worked data can be applied immediately as soon as matchmove data arrives, unnecessary waiting time in the production process is significantly reduced, and project schedule management becomes easier.

The LiDAR-based matchmove workflow allows maintaining a consistent scene scale and direction even in VFX work of the same space with many cuts, and minimizes repetitive scene dressing work that can occur in each cut. This secures additional time to focus on core tasks important for quality improvement, such as modeling, animation, lighting, rendering, and compositing, thereby significantly enhancing the quality of the result.

75mm Studio will continue to actively support client projects to achieve greater efficiency and higher quality results through high-precision LiDAR scanning and matchmove services. Thank you.