Do i need fresnel node for principle shader???
No. Fresnel is built into the principled BSDF. The specular slider controls it’s effect.
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Thankyou cody.
Glad to help.
By the way, if you prefer working with physical IOR values in the specular slider, there’s a formula in the Blender manual:
https://docs.blender.org/manual/en/latest/render/cycles/nodes/types/shaders/principled.html
It’s the first hint in green. The default value is fine in most cases, but it’s there if you like to get technical.
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You may want to use it if you mix the principled with a manual glossy (topcoat) shader, as it’s builtin topcoat is (was?) buggy wrt topcoat roughness in that it can’t be properly texture mapped (it stays at zero until a certain threshold is reached creating a sudden change in roughness).
If you’re mixing with anything else, you probably should use a different way of mixing, as fresnel is only for splitting “what goes into the object” and “what is bounced off the object”.
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