For some reason, the bump of bread only works in eevee, in cycles only displacment works. In other projects displacment works normally. I use procedural texture

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  • $\begingroup$ Can you share a screenshot of your node setup? $\endgroup$ – Sanbaldo Jun 29 at 11:16
  • $\begingroup$ @Sanbaldo I attached a photo to the publication. All material is very big, but in generally there is some superimposed textures, then I guide black and white factor in mixing colors and input height in displacement node, then displacement node into displacement material output $\endgroup$ – user99579 Jun 29 at 11:29
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    $\begingroup$ you can try using the NORMAL node inside the "principled BSDF". you should connect there a BUMP node. $\endgroup$ – Sanbaldo Jun 29 at 12:14
  • $\begingroup$ @Sanbaldo if I use setting "Bump only" effect becomes like Eevee, may be I have not enough faces. Also In Cycles lighning is not such beautiul. Probably I should use only bump effect $\endgroup$ – user99579 Jun 29 at 12:30

I think it goes like this:

If you set the Cycles settings of a material to 'Displacement' only, then EEVEE, not supporting Displacement shading, will substitute Bump mapping for any Displacement input to the Material Output node, to make the Cycles and EEVEE renders to look as similar as possible.

Cycles can't depend on that substitution - if you want a normal or bump-map in Cycles, you have to ask for one explicitly:

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Not necessarily in Object space, but you get the idea..

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