Reply To: {SOLVED} Particle Hair appear black in Cycles Render
What shader are you using? “Hair BSDF” is currently only working in Cycles (see “Blender 2.91 Manual” here).
Therefore you can’t add this shader to your node tree with EEVEE being the active render engine:
Although the “Properties Editor” allows you to add a “Hair BSDF” under EEVEE, “Hair BSDF” doesn’t show up in “Preview Rendering” as well as in the final rendering (F12 key). The color of the hairs is black regardless your settings in the “Hair BSDF” shader.
But your problem is in the opposite direction: colored in EEVEE and black in Cycles. Maybe it’s a similar problem that there is a shader or setting only being supported by EEVEE.