Converting map to normal map

[Jelle_W]

First, do you really want an 8-bit heightmap of the entire world? If you reduce it to only 256 levels, there won't be enough detail left in it to make it worthwhile.

Yes

And do you really want a normal map (the purple image at the bottom of the screen)? Or do you want to stop at the point where you have the heightmap? The tutorial's Mac-only instructions start right after the heightmap's been prepared. If you continue, you'll wind up with the normals. If you instead stop in step 3 and go to Image > Mode > 8 bits/Channel and Image > Mode > Grayscale, you should have what you want. If you're not running the script to make the normals, you don't necessarily need to resize, either.

just a few hours earlier i had an e-mail exchange with the writer of the tutorial, and he said something similar.

Seems to me that doing so misses the point of getting this enormous file to begin with—why download such a huge image if you're just going to throw away 96% of the pixels?

I want to use the map of the earth in a particular program which will only take 8 bit grayscale heightmaps, so i'm sure i want this. And the dimensions which i want to use are greater then any of the smaller resolution images. I rather downscale to preserve what little extra detail that might still show as upscale a map.

I'm looking at the 8bit grayscale heightmap right now my problem is resolved