We’ve rolled out a big update to the Video Renderer and introduced a new drawing tool in the AOI Editor in Pupil Cloud. We have also collected a number of smaller improvements from recent months that have already made their way to production.

Video Renderer: Full Overlay Customization

This release enables you to further customize how gaze and fixation are visualized in the video renderer - mirroring the behavior in the rest of the UI. You can also render synchronized eye videos as overlays now.

• Gaze: Choose between circle or crosshair styles, and adjust size, color, width, and transparency.

• Fixations: Modify fixation scanpath and fixation circle colors.

• Eye video overlay: Select the position and transparency of eye videos to be included in the resulting rendered video.

AOI Editor: Rectangle Draw Tool

We added a rectangle drawing tool that lets you draw and subtract rectangular shapes directly in the AOI editor. Hold Shift to draw perfect squares. You can use both the pen and rectangle tool to define AOI geometry.

Incremental Updates You May Have Missed

We’ve also released several smaller updates over the past months — now bundled here for convenience:

07 August 2025 – More Gaze & Fixation Visualization Options

• Customize gaze visualization (circle or crosshair) with adjustable size, color, width, and transparency across all video playback in the UI.

• Enable or disable fixation history and fixation numbers for flexible analysis.

22 July 2025 – Improved Blink & Fixation Insights + Keyboard Navigation

• Hover to reveal blink and fixation details: Quickly view event IDs and durations directly in the timeline.

• New keyboard shortcuts:

  • Press S to seek to the next fixation

  • Press A to return to the previous fixation

Try it out

Visit Pupil Cloud to explore the new features.