here is a sketch - going to cut and arrange the islands and maybe even join them in a row - I'd love to get rid of volcano and put river somewhere but either way, it's going to be one huge map - 2048x2048 1 unit 1 meter.
and a little comparison shot - as you know: 1024x1024 1 unit = 2 meters is 2048x2048 terrain size
tl;dr this could work (the reloaded heightmap is actually going to be 2048 x 2 meter)
Now take a look at that huge island map and how much is actually game area - red overlay ...
If FarCry reloaded is going to be one big level we need to plan how much we can put into it. As we know the island level is huge but less than 10% of it is actual game area - and that 10% area is only 30% land. Let's take a look at the tank level: a 2048 x 2048 map that probably translates to 4096 terrain size (1 unit x 2 meters). Now that is all terrain, no water. And not that dense - no jungle, a few tree islands in a see of grass. Uses the least amount of textures too.
Here is the heightmap: -
and this is the actual game area that the player can access:
might be a little less actually - at the bottom that could already be mine.cry. Anyways we can see that the maps are huge but not really. The question is thus, how much can the engine handle at acceptable framerates? who knows ...
Lets look at this then:
So here, to get an overview I took a couple of the FarCry heightmaps, cut out the 'real' game area, erased an estimate of mountain tops and compared to tank.cry we can see that we are getting closer. Still about 3 times the terrain but not impossible. Now I am going to decide on which FarCry heightmap parts I am going to use and weld them together to an epic archipelago that will rival Kong Island.
That mod comes without the cry files sadly - would have loved to see how they built the old fortress and maybe even ask if I could use it.
Anyways. The next and last one is Rebellion from FarCry which is a great level and will house some underground facilities too. And inside the atoll are the small islands from the Boat level. All in all we have 6 FarCry levels (Archive is in the rebellion heightmap too), and that should make for a huge map with hours of gameplay. I started filling in points in the heightmap image below and will upload the final version once done.
Now this heightmap I will load into the sandbox and there I will go over the parts that are not used / accessible in FarCry and make them interesting. For instance I want to have a River and one grassland area similar to the Tank level where I can implement the horror of being hunted by a pack of Trigen in high grass (Jurassic Park - Velociraptor etc etc).
This would then be 2048x2048 - 1unit = 2meter so we will have a 4096x4096 terrain map.
... the green dots are locations from the FarCry1 game. The 2 blue dots are 1 nanosuit player start and an Airfield I want near the main camp in the original Pier level. - the trigen area is an Idea so we can have a little Jurassic Park feeling. the 3 red squares are the underground facilities - mini levels so to say ...