I have been trying to get a good looking shaded relief model out of GRASS and Qgis for a day or so now and just can't seem to get it. The biggest problem I'm having is the valleys look like mountains, but I just can't seem to get the right combination in order to show mountains and valleys look right.
Bellow is a some pictures of the problems:
DEM (Brown is high and Red is low, red is only used for a visual check)
Shaded Model 1 with DEM Sun position 180 degress from North, sun height 80
Problem: Hills look good but the river (in red) still looks like a mountain even though it's the lowest point on the map.
Shaded Model 2 with DEM Sun position north west (315 degrees), sun height 60
Problem: Again the hills look good but the river (in red) still looks like a mountain even though it's the lowest point on the map.
I have tried all different combinations of angles and sun heights and I just can't seem to get the river to look like a river, it always looks like a hill.
Can anyone point me in the right direction on what I might be doing wrong?
EDIT: So I took the contour data home and ran the process from the start and used the defaults for r.shaded.relief and got this:
This looks much better to me, not the greatest colours but we can change that. I think my work install of grass must be busted because even the defaults looked bad.