http://openpistemap.org (http://openpistemap.org) have a great looking hill shade (better than the hikebikemap shade), and piste routes are also a overlay.
The server with the hill shade is really slow and sometimes locus show "Unknown problem". So don't download anything for now, only use it for online viewing...
As locus already have the map included, the Tile Usage policy should also apply to this Overlay: http://wiki.openstreetmap.org/wiki/Tile_usage_policy (http://wiki.openstreetmap.org/wiki/Tile_usage_policy)
if it does not exist, create a /sdcard/locus/mapsOnline/custom/provider.xml and insert this text:
If it already exist edit it and just insert the <provider*> ... </provider> stuff inside the <providers> ... </providers> xml tags.
<?xml version="1.0"?>
<providers>
<provider id="10229" type="0" visible="true" required="false" background="-1">
<name>OSM - layers</name>
<mode>OpenPiste landshade overlay</mode>
<area></area>
<url><![CDATA[http://tiles2.openpistemap.org/landshaded/{z}/{x}/{y}.png]]></url>
<zoomPart>{z}-8</zoomPart>
<zoomMin>8</zoomMin>
<zoomMax>26</zoomMax>
<tileSize>256</tileSize>
<attribution>Landshade overlay tiles come from http://openpistemap.org, Terms of Use: https://wiki.openstreetmap.org/wiki/Tile_usage_policy</attribution>
</provider>
<provider id="10230" type="0" visible="true" required="false" background="-1">
<name>OSM - layers</name>
<mode>OpenPiste piste overlay</mode>
<area></area>
<url><![CDATA[http://tiles.openpistemap.org/nocontours/{z}/{x}/{y}.png]]></url>
<zoomPart>{z}-8</zoomPart>
<zoomMin>17</zoomMin>
<zoomMax>25</zoomMax>
<tileSize>256</tileSize>
<attribution>Piste overlay tiles come from http://openpistemap.org, Terms of Use: https://wiki.openstreetmap.org/wiki/Tile_usage_policy</attribution>
</provider>
</providers>
If you already use the vector map with "Hiking" Theme, you don't need the piste overlay, its already in there.