"Kenneth" <kdw### [at] gmailcom> wrote:
> "Samuel B." <stb### [at] hotmailcom> wrote:
> > Hi,
> > Just testing out some moon maps. (...)
> Hi Sam, it's great to see you posting on the newsgroups again.
Hello Kenneth, it's good to see that you're also still around.
> That's a beautiful image-- especially with the added Earth glow, as Thomas
Thanks. The best part is that is renders quickly. But parse times do go up when
using the highest resolution displacement map. That map is about half a gig in
> So the 'unsigned 16-bit' file is the displacement map you used (with its
> apparent 8-bit precision, and some reversed normals!); thanks for the info.
> Have you tried placing a 2nd Sun light_source on the other side of the Moon, to
> see what happens with the normals in the normally 'shadowed' half?
Okay, so as it turns out, I was misusing the map in Blender, and that's why the
normals were being reversed. Blender was probably trying to calculate the normal
from three separate color channels because I plugged the image directly into the
displacement slot. The trick is to use a special node
(Add->Vector->Displacement) and use that instead.
> It's interesting that the website's description of the color map says it was
> made with a gamma of 2.8; do you have any idea why that would be so (rather
> than, say, 2.2)?
Ask NASA ;) I'm sure there's a logical reason, and it probably has to do with
outdated color space specifications. Maybe Clipka would know...
Post a reply to this message