Is it possible to show EPSG:3395 base map in 3d mode?

[Dmitry Bezrukov]

Hi TerriaJS team, 

My TerriaMap instance uses Google and OSM base layers which are in the standard EPSG:3857 projection. Each layer is added as UrlTemplateCatalogItem and everything is fine.

I wonder is it possible to add an EPSG:3395 layer served by a tile-server? 

Predictably, when I add an EPSG:3395 layer passing xyz scheme to UrlTemplateCatalogItem, there is a notable offset when switching between EPSG:3395 and OSM.

There's been some movement toward EPSG:3395 support in Cesium:

EPSG:3395 support

https://github.com/CesiumGS/cesium/issues/2084

Support for Proj4JS and Custom Projections in Columbus View and 2D

https://github.com/CesiumGS/cesium/pull/7502

But as I understand it's still just a desirable feature.

Terria uses its own fork of Cesium and has some additional tools for working with layers, - I thought EPSG:3395 could be handled by Terria.

Thank you for the great project!

Dmitry