How do I plug in a bump and a normal map in aistandardshader

[dna_hard3]

Hi, I’ve been searching around and I can’t find any answers as to how I plug-in my bump map texture with my existing normal map texture in aistandardshader

i currently have the normal connected to bump under geometry...

[laurence.cymet]

You can combine the output of multiple bump2d nodes to get this effect.  You can use a colorMath node to add their outputs together, or use the MAX mode in colorMath to get a more subtle effect.  

Hope that helps!

[Stephen.Blair]

You can chain bump and normal maps using the Maya bump2d node.

The bump map has to come first. Then you connect a normal map (bump2d with Use As set to one of the normal types).

https://docs.arnoldrenderer.com/x/mgxkAg

[laurence.cymet]

Correction - MAX is the correct mode to use in the colorMath node if you are using this technique. 

The technique Stephen mentioned below is great as well, but note that neither of them are currently supported in the viewport - so always check your render to confirm.  

[Stephen.Blair]

What's interesting (at least to me) is that both shader trees resolve to the same thing.

MtoA replaces all Maya-specific shader nodes with pure Arnold nodes (pure = nodes included with Arnold).

Something like this: