mike-000

A further observation is that pixel measurements are generally made from top left, so a positive Y value is downward (as it is in `ol/style/Text` `offsetY` property). However a positive...

> Upon further examination, we found this problem to be due to alpha premultiplication on iOS, Does that mean that even tile textures are premultiplied in IOS? Does the fix...

I just ran my CodeSandbox on IOS Safari via BrowserStack. There is a black hole at the top of Everest where the alpha is 0, which does not happen on...

Using a third party PNG parser and loading into data tiles renders correctly plus the current `getData()` works as expected https://codesandbox.io/s/simple-forked-nxy41s?file=/main.js

The coordinates in MVT tiles are calculated relative to the tile extent. You can produce the same shadow effect by offsetting the source tilegrid in the shadow layer https://codesandbox.io/s/mapbox-vector-tiles-forked-m3x6de 3d...

For WebGL renderer this was fixed by #13648 It is still an issue for canvas tile layers, and is fixed by #13609

If the WMTS allows CORS access you could remove all fully black pixels by wrapping the tile source in an `ol/source/Raster` https://codesandbox.io/s/raster-source-xs12ep or by styling with a WebGL tile layer...

@tschaub @ahocevar This has now been fully reworked from the original experimental implementation to be a DataTile equivalent of a ReprojTile. Would anyone like to review it?

No, gutter is now also available for XYZ (currently we have no examples). When rendering with WebGL without a gutter there are always tile edge effects when interpolating, sometimes quite...

When I copy you code and run it outside of jsfiddle it works correctly: https://jsbin.com/futajiripe/edit?html,js,output