I've done this before doesn't turn out like this. What am I doing wrong?

Rhino Rhino for Windows
1

Importing heightmaps and the things come in all blocky. The images are clearly colored greyscale AND THE MAPPING IS HORRIBLE. dumbed the imports down to 256 x 256 and still horrible… no smoothing at all. even though the locations for the blockiness were the same color. stupid simple import to dotracktest2

Rhino_p1SsIMbCnI
Rhino_p1SsIMbCnI1360×738 492 KB

4

Please type out the steps you take to generate this. With a sample size of 256x256 I see

image
image919×330 115 KB

Also please attach the result of the Rhino command _SystemInfo.