In your server.properties, there should be a line where you can set the texture pack. Copy the direct download link for the pack (the link directly to the file, not the page that you download it from; it should end in.zip) and paste it after 'texture pack=' in your server.properties.
Needed: Realms support for Resource Packs
Hello good Realm developer folks,
I'd like to highlight the need for Realms to fully support Resource Packs. Specifically, to prompt clients to download them as can be done on servers.
With the number of custom maps that use resource packs increasing, more and more of us want to be able to upload these maps to our realm to play with our friends.
For example; The Voxelbox just released an amazing map called 'The Muk-luk Lodge', but you absolutely need to play it with the Resource Pack otherwise there is no point.
Free Download Server
Sure, we could upload the world (from our single-player worlds) to our Realm, and then send everyone the resource pack, but I just know that some of the players will have difficulty getting it set up correctly.
It would be much nicer if the Realm prompted them to download the resource pack, in the same way a Server can.
What would be really nice; please don't ask us to upload the resource pack to the internet separately, and give the URL to Realms (which would be similar to how this is done with on a server, using server.properties). Instead, allow Realms to use the same feature available in single-player worlds by including a resources.zip in the world directory 1.
Realms could be set up to check the world being uploaded for a resources.zip file, and then prompt anyone connecting to download and use it. That would be awesome, and the most painless way of doing it that I can think of.
Please please please consider this, to help players, and also the map making community.
How To Download Server Resource Packs Minecraft
And please, accept my thanks for the amazing work you have already been doing. Especially the new world switcher that you added to Realms - it's really useful!
Thanks, Gnasp
1: http://lemoesh.com/best-practices/packaging-resource-packs-with-your-map/