I'm trying to make exact maps of suncast (or mooncast) shadows for outdoor adventure use. But i can only get shading with ambient light and such. what i really want is to produce a shader that is black where the sunrays do not reach, and white where they do.
Been fiddling around in Surfer 12 SurfaceMap with lighting and Material color. I set the light to 0 degrees due west (180) in Surfers numbers :)
Theres to much light in areas where there should be darkness (for my purpose).
In the Surfer 13 Demo i've tried Shaded Relief. Getting bette results. When i fiddle with the grayscale gradient like shown on my screendump.
Focus on the ridgeline in 410400, 6833000. On the first picture the shadow is perfect on the ridgeline, but there is light in the valley to the east that should have been in darkness. On the second picture i have slided the treshold between black and white coler to the right. I get better (but not perfect) shadowing in the valley, but to far west on the ridge.
I understand that the road im on is probably not the one that will take me where i want to go. Anyone with any ideas?
Kind regards, Kåre
Please sign in to leave a comment.