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Which node should I add to this material to make the structure appear bumpy (mortar inset relative to the bricks)?

screenshot

I tried various combinations like [Brick Texture] Fac > [Bump] Normal > Normal [BSDF] and [Brick Texture] Fac > [Bump] Normal > Displacement [Material Output] and [Brick Texture] Fac > Strength [Normal map] Normal > Normal [BSDF] and so on, but I didn't find one that had any effect.

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The bump node converts a height to a normal map by reading grayscale gradients. If the height map is too sharp there isn't anything to create surface angle shifts.

Increase the mortar smooth to get a broader gradient at the brick edges

enter image description here

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  • $\begingroup$ Oh, ok. Now I see that both the Bump and Displacement node only change the color of the object. Makes sense. $\endgroup$ – AndreKR Aug 9 at 16:50
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Jackdaw's answer is good if you only want it to appear bumpy, but there is actually a way to make it bumpy, but it only works with the Cycles rendering engine.

Connect the Brick Texture to the Displacement input of the Material Output (possibly passing it through another Displacement node) and then in the Material Properties under Settings set Displacement to "Displacement and Bump":

screenshot

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