OSL: How to create displacement maps from images

[Okidoki]

In general OSL was made for this… you may look into this:

OSL : Displacement Functions

Hello, In the OSL language specification, we read : Shader types include the following: surface, displacement, light, volume, and generic shader. Some operations may only be performed from within certain types of shaders (e.g., one may only call displace()or alter Pin a displacement shader), and some global variables may only be accessed from within certain types of shaders (e.g., dPdu is not defined inside a volume shader). I try to make a displacement shader like it : displacement Di…

and maybe someo newer docu…