New answers tagged hillshade
It seems like a an resampling issue. I guess you used Nearest Neighbor, which is also the defualt setting. Nearest neighbor can lead to small pixel displacement of up to half a pixel. You can try to set the resampling method to bilinear and have a look if it fits your needs better. Bilinear interpolates pixel values by leaving the cells untouched in position ...
What you have is a hillshade surface built from a LiDAR point cloud. According to ESRI: A hillshade is a grayscale 3D representation of the surface, with the sun's relative position taken into account for shading the image. So each pixel of your .tif raster has an hypothetical illumination value given a reference position of the sun. What you want is ...
I am not sure if I got you right, did you try to change NoData value to No Color from Symblogy? Symbology -> Check "Display Background Value (RGB)".
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