Rendermap script: black or white images in Nitrous DX11 for procedural map

[robert3dsmax]

I would like to "bake" a procedural noise map into a bitmap with the following command:

rm = renderMap $.material.texmap_bump size:[512,512] fileName: "C:\\temp\\noise.png" display: true

But the displayed and later saved image is either black or white, but never displays the correct bitmap.

If I render the bitmap with right-click on the material slot and click on "Render map", then it works.

I have 3DS Max opened with Nitrous DX11. If I open it with the Legacy Direct3D 9 driver, the max-script works.

Any idea how to fix this?

Thanks

Robert