Hi, is there any possibility to build an OSL shader for karma? If there is, how to do it?

So far there is no support for OSL in Karma and latest I heard was that there is no short term plan to support it, but that can potentially change in the future

MaterialX shader graphs already generate OSL code which is then sent to render engines. As far as I understand it the MaterialX standard is basically just a node based way of writing OSL and GLSL shader code. So it's weird OSL support isn't on the SideFX roadmap since Karma is entirely built around MaterialX. You can read about the MaterialX OSL shader framework here:
[github.com]

gabriel101x
MaterialX shader graphs already generate OSL code which is then sent to render engines. As far as I understand it the MaterialX standard is basically just a node based way of writing OSL and GLSL shader code. So it's weird OSL support isn't on the SideFX roadmap since Karma is entirely built around MaterialX. You can read about the MaterialX OSL shader framework here:
[github.com]

MaterialX is just a material definition that has their library definitions implemented in OSL, MDL and GLSL

That however doesn't mean that a compatible renderer can or has to use any of those implementations

To make compatible renderer it simply means you have to implement every single node from definition in the "shading language" your renderer uses which in terms of Karma is neither of the mentioned ones, so the work is 100% on SideFX to make sure they stay up to date with the definition and have implementations for Karma or at least until they decide to support MDL or OSL