IssueTracker

I've noticed in certain areas of the dataset, cracks are visible along the seams of adjacent tiles. Through these small gaps, we can see through the dataset in many viewers. I've observed this in our products viewer and in the Cesium.js viewer as well.

Fantastic dataset by the way and thrilled to see it available in the 3D Tiles specification. Thank you.

Issue report
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What steps will reproduce the problem? Please provide a link to a
demonstration page if at all possible, or attach code.
1. Go to Cesium Sandcastle viewer and navigate to the Google Photorealistic 3DTiles example: https://sandcastle.cesium.com/?src=Google%20Photorealistic%203D%20Tiles.html
2. Using the Geocoder widget in the top right of the 3D window, type in Halfdome, CA [Enter]. Camera will fly you in extremely close to the dataset, you may have to back the camera off a bit to bring the tiles into view (right click and drag). We want to be viewing the maximum resolution data from this camera location.
3. As soon as you bring the tiles into view, you should see separation between two tiles towards the right side of the scene.