I need help for make mountains topography

[johnvanvliet]

if you already have contour lines on a map there are a few ways of converting that to a 16 bit ( or 32 bit) black and white height map

using qgis and inkscape for a vector line contours

this can also be done in Blender

or a close approximation can be done in Gimp and using the "Morphological filter" run erosion and dilation passes on
-- works fairly well but not vert accurate , just close

and if this is a real world location
the real height data is available

this can be processed in Qgis to output just counter lines
or even in gimp or photoshop