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New to blender, and attempting a sort of material wipe, one material is wiped away revealing another one. I'm having trouble formatting this in a way to add a metallic/glossy texture to the black portion of the sword.

I do know how to use the principled bsdf in normal situations, but I've tried placing it in many different spots and none seem to work.

I've attached a screenshot of the shader setup, and 2 different frames of the animation to give an idea of what I'm doing. And if anyone wants to know, I'm working in evee.

Shader setup: https://gyazo.com/aca1da1aba143207557e243ee5b45e5c

Example frame 1: https://gyazo.com/96008081c517e50e94c0d94424c095f9

Example 2: https://gyazo.com/a5701659642a536c1bdca59c76d4634b

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    $\begingroup$ Please use the built-in screenshot adding system to add screenshots to stackexchange questions. In the meantime, you can probably do what you need with a gradient texture, and a Math node set to Greater Than, with the threshold animated. $\endgroup$
    – TheLabCat
    Commented Sep 15, 2021 at 19:13

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you can replicate this effect with this node setup:

enter image description here

result:

enter image description here

The "trick" is to use the mix shader node. The factor value decides which material it should take for each pixel. To animate this we don't take a constant value, but we animate it. In my example i took the y coordinate of the object and compared this to an animated value. Because a comparison with a constant value would just be a line distribution and a bit boring i also added some noise to make the effect a bit more interesting. You could of course add here different texture value e.g. wave, gradient...whatever you like. Shader nodes is damn powerful.

boring "line" example: (constant comparison)

enter image description here

wave example:

enter image description here

other wave example:

enter image description here

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    $\begingroup$ You really are having fun, here :D $\endgroup$
    – Robin Betts ♦
    Commented Sep 16, 2021 at 8:05
  • $\begingroup$ Finally i understood 2% of the shader nodes and it’s just awesome. And yes…lot‘s of fun with BLENDER 🥰😍 $\endgroup$
    – Chris
    Commented Sep 16, 2021 at 8:15

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