Gérald Choqueux

@mgermerie, this PR is ready?

There is a another way to load Potree 2.0 in iTowns, it's use directly Potree. [see this example](https://github.com/iTowns/PointsTools#how-load-ept-cache-with-itowns-and-potree)

@mgermerie could you refresh this PR?

Thank you, it's a very interesting article. It is indeed a good way to project the rasters on the globe. We will keep this in mind for the development of...

could you add `updateStrategy`in your source : ```js const source = new itowns.WMTSSource({ // ... updateStrategy: { type: 1, options: { groups: [0, 4, 8, 12, 16, 19], }, //...

I fix your example : https://github.com/gchoqueux/itowns/blob/ISSUE_1346/index.html There's a problem with original viewer extent is too small to represent the world extent. So the elevations are exaggerated and generate too much...

`Extent` is geographical bounding rectangle defined by 4 limits: west, east, south and north. (visiting [doc](http://www.itowns-project.org/itowns/docs/#api/Geographic/Extent)) > that extent because is the area where the elevation data is So define...

We should integrate this feature. There isn't simple solution without change of itowns code. it's necessary to change the `LayeredMaterial` to add shadow support.

Yes, it's possible to customize but the default methods aren't exposed in itowns. I will do a PR to expose the default methods : - `process3dTilesNode` : default method to...

Pr opens #1689