Mode in the mix shader?

[excentriPMNA2]

The following description in Arnold manual is written. (

https://support.solidangle.com/display/A5AFMUG/Mix+Shader )

"The Add mode is used for adding two shaders that only emit light."

I don't know "shader that only emit light".

What shader is that shader?

[maxtarpini]

Well if you don't know them .. you may not really need them 🙂 ... btw aiblackbody and any flat color shader when not attached as texture to a material slot ... may be seen as an emitter.

[excentriPMNA2]

thank you for your reply