id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
13778	Not displaying some lower layers where there are no tiles in the upper imagery layer	naoliv	team	"Go to `-22.328129695061985, -52.36428678552035` and enable the ""IBGE Mapa de Setores Rurais"" layer.
At the scale of 5 km we have this:

[[Image(https://i.imgur.com/wZ4AGDw.png)]]

Black parts are where we don't have tiles available and white parts where we have. Good.

Then enable the Bing layer, with the IBGE layer on top of Bing:
[[Image(https://i.imgur.com/dC07zL2.png)]]

Still good. We are seeing the lower layer where we don't have data in the IBGE one.

Now zoom one level, at the scale of 4 km:
[[Image(https://i.imgur.com/wOU3BTh.png)]]

There is a black part where we should be seeing the Bing layer, but we aren't.

At 2 km scale we have even more black areas:
[[Image(https://i.imgur.com/TbbvYkB.png)]]

And at 1 km scale:
[[Image(https://i.imgur.com/RLFNmHX.png)]]

Shouldn't we keep seeing the Bing layer instead black areas, since there are no tiles there? (the error message is also saying this: ""No tile at this zoom level"")

JOSM:
{{{
Build-Date:2016-10-09 13:51:08
Revision:11110
Is-Local-Build:true

Identification: JOSM/1.5 (11110 SVN pt_BR) Linux Debian GNU/Linux unstable (sid)
Memory Usage: 674 MB / 4029 MB (376 MB allocated, but free)
Java version: 1.8.0_102-8u102-b14.1-2-b14, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1920x1080
Maximum Screen Size: 1920x1080
Java package: openjdk-8-jre:amd64-8u102-b14.1-2
Java ATK Wrapper package: libatk-wrapper-java:all-0.33.3-9
VM arguments: [-Dawt.useSystemAAFontSettings=on]
Dataset consistency test: No problems found

Plugins:
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+ Create_grid_of_ways (32699)
+ FastDraw (32938)
+ FixAddresses (32796)
+ ImportImagePlugin (32699)
+ OpeningHoursEditor (32699)
+ PicLayer (32796)
+ SimplifyArea (32796)
+ apache-commons (32699)
+ buildings_tools (32944)
+ download_along (32946)
+ editgpx (32699)
+ ejml (32680)
+ geotools (32813)
+ graphview (32796)
+ jogl (1.0.46)
+ jts (32699)
+ kendzi3d (1.0.191)
+ kendzi3d-resources (0.0.1)
+ log4j (32699)
+ measurement (32936)
+ merge-overlap (32699)
+ opendata (32898)
+ pdfimport (32796)
+ photo_geotagging (32699)
+ poly (32699)
+ reverter (32796)
+ tageditor (33021)
+ tagging-preset-tester (32869)
+ todo (30000)
+ turnlanes-tagging (252)
+ turnrestrictions (32796)
+ undelete (32699)
+ utilsplugin2 (32815)
}}}"	defect	closed	normal	16.10	Core imagery		fixed		wiktorn