The hillshade visualisation have transparent pixels

[Pierre-JeanMuller]

I generate the hillshade from the elevation then I publish it and view it using ArcGISDynamicMapServiceLayer. I got transparent pixels.In ArcMap, there is no problem, its only when the layer is visualised.

I tried to put white color on NoData pixels, but it doesn't work

[Pierre-JeanMuller · Accepted solution]

To resolve the problem, I have to export it as a png image then publish it