To generate LOD with Oscape:
1. Make sure your heightfield ESM (can't be ESP, Oscape won't read ESP worldspaces for some reason) is activated in your mod load order list.
2. Start Oscape, make sure that it's in Skyrim mode (under 'Game').
3. Click Fill.
4. Select your worldspace in the list, check feature-map and surface-map boxes.
5. Browse to desired output folder, doesn't have to be in your Skyrim directory, anywhere will do.
6. Click Extract. If you get an error message that it can't find the worldspace, close Oscape and return to step 2. This always happens for me, second try does work.
7. Wait until it is done, Oscape should automatically switch to the second tab (Preview).
8. Usually all the data here is already correct, it will give you rough view of the RAW file it extracted (don't skip all the previous steps because you already have a RAW file btw, Oscape's is different) and in the tables you can select which area will be generated. Default is everything.
9. Go to the next tab 'Generator'.
10. The first value you should change is 'Target of max. resolution'. Try a value of 728000. Don't ask me details, I don't know all the details how it works, but this is a good value for my map. Higher and it crashes for me.
11. Under that, make sure the 'Meshes', 'Normals' and 'Colors' are enabled.
12. For 'Meshes', disable DirectX and Wavefront.
13. For 'Normals' and 'Colors', disable PNG, PPM and all the resolutions except for 1024 (or if you prefer a different resolution choose that).
14. At the bottom select the output folder, can be anywhere. Click Generate.
15. When it is done, Oscape switches to the 'Installer' tab. Enable all the 'Install' boxes here. At the bottom of the tab browse to your Skyrim Data directory. Click install.
16. When installing the textures, Oscape always gives me errors that it can't convert the .dds files. I always press Retry and then it seems to work (keep holding down Enter if you get thousands of messages).
Quick Q for Maegfaer, which hex editor do you use. One or two look somewhat dodgy.
Hexplorer.