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I'm trying to get more familiar with the Shader Editor. I would like to create a realistic steel texture on the character's claw, shoulder piece, etc.. I have an Image Texture I'm using connected to the Metallic part of the Principled BDSF which looks good. The Metallic map is painted so only the metal portions of the model are metallic. But I would also like to combine it with a Noise Texture and a Bump node. How may I go about this?

Perhaps I could use a Mix Shader with 2 Principled BDSF's attached to it? I tried that and it didn't seem to work.

Thank you so much!!!

enter image description here enter image description here

Natalia DaLomba
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    If you already have a mask texture for the metallic parts and would like to apply bump only there you can use the same texture as mask for the bump. Use a Mix Texture node over a Mix Shader , it is preferable to mix at texture level whenever possible – Duarte Farrajota Ramos Jan 18 '23 at 14:50
  • Would you be able to attach an image of what that would look like in the Shader Editor? – Natalia DaLomba Jan 18 '23 at 17:51
  • Here's a roughly the same use case https://blender.stackexchange.com/questions/90064/using-an-rgb-map-to-assign-various-shaders-in-a-material – Duarte Farrajota Ramos Jan 18 '23 at 18:02
  • I've tried to apply similarly what they're doing in that post but it only made me more confused. I should iterate that I am a complete beginner with the Node Editor. Can someone please post a new image from them creating a new set up in the Shader Editor for my situation? Thank you... – Natalia DaLomba Jan 18 '23 at 19:33

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You should use your metallic image texture mask to mask the bump map input, much like you masked metallic parts.

Assuming you mask is a black and white image, plug its Color output into a Color Mix Node into the Factor socket.

Plug the Color Mix Node result into the Bump node Height socket. From then on use whatever you like as bum maps on both zones.

Assuming you want the non metallic parts without roughness use a solid color. On the other socket use your Noise texture.

enter image description here

This is the result using this silhouette as maskenter image description here

Duarte Farrajota Ramos
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