converting between metallic and specular PBR textures

#1
Hi Collective

just wondering if anyone can recommend a tool to convert texture maps to PBR Specular, ideally in bulk

i can see how todo this in photoshop, https://www.marmoset.co/posts/pbr-texture-conversion/

Diffuse Map

Load your albedo map into Photoshop
Create a new fill layer that is black (#000000)
Paste your metalness map into the layer mask of your fill layer

Specular Map

Make a duplicate of the original albedo map and move it above the fill layer
Create another fill layer with a value of #383838
Paste your metalness map into the layer mask of your fill layer
Invert the layer mask


however i own a large collection of PBR models and one by one isnt going to be viable.

i can see plenty of links in google for diffuse to albedo but hardly anything the other way around

Any thoughts? even drag file one by one into a tool would be better than photoshop layers.

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