How do I review 360˚ spherical panoramas?

View, navigate and sketch on lat-long panoramas in SyncSketch

SyncSketch supports synced reviews of 360˚ spherical panoramas with sketching.

In order to be treated as a 360 panorama, the uploaded image file must be rendered or stitched as an equirectangular (aka lat-long) image (in any supported still image format) with an aspect ratio of 2:1.  Many renderers and 360˚ cameras will create such files.

Why is it behaving like a plain still image?

When imported into a review, a panorama may initially appear as if it were any any other uploaded still image.  To set it as a spherical panorama, reveal it in the media drawer beneath the review, then click on the menu_dotdotdot menu, and select Set as 360 image:

SetAs360

Navigating

Now when you open the review to that file it will be displayed as a navigable spherical panorama.  Click on the camera tool at the bottom to switch to Camera Navigation mode:

CameraNavigation

Drag within the viewing area to navigate the scene.  Any reviewers who have joined the review will be synchronized; when someone navigates the scene, everyone will be looking at the same angle.

Sketching

Once you've found an angle that requires an annotation, click the Brush tool to leave navigation mode, and then draw your sketch. This will create a comment in the comments pane at the right.

The comments pane may need to be revealed by clicking on the speech balloon icon in the upper right:

control_commentpane control_commentpane_badged
Hides/Shows Comment Pane Badge indicates 3 sketches

The sketches do not exist in 3D space.  To revisit them, you must return to the exact viewing angle from when the sketch was made.  There are three ways to do this:

  1. Click or tap the sketch navigation controls to the left of the upper toolbar to jump from angle to angle.
  2. Use the up and down arrow keys to jump from angle to angle.
  3. Click or tap on the corresponding comments in the pane at the right to return to those viewing angles.
Sketch Navigation Controls
Sketch Navigation Controls

The note created when you begin a sketch simply contains the word "sketch" by default.  Click or tap the note's pencil icon to replace the text with something more descriptive, or else simply use these comments as "bookmarks" to return to the viewing angles where you've sketched by clicking or tapping on them.

Limits

It must be a 2:1 equirectangular panorama

As stated earlier, SyncSketch currently only supports the same 2:1 equirectangular renders that Google and Facebook support.  This excludes the "Swedish-flag" style cubemaps popular for use as, for example, Unity skyboxes.  There are online utilities that will convert cubemaps to equirectangular/lat-long panoramas.

Size limits

The panoramas are subject to still-image pixel dimension limits.  For example, customers on Enterprise plans can import still images of virtually any size, but users on other plans must keep each dimension of the file 8192 pixels or less, an important consideration for panoramas.