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Topics - w.frazier

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Ok, so.. full disclosure, I do not know a great deal about this program.  It is, unfortunately not even remotely intuitive, and while there are a wealth of tutorials out there, my frantic workload has thus far precluded me from being able to set aside sufficient time to go through them.

My aim is to try a proof of concept substance to determine if Designer can have a place in our workflow with VizRT.  The sample .sbsar files I load into Viz have adjustable parameters for many values, but the most important one for this purpose is 'roughness', which gives the substance's 'faked' reflection the ability to go from mirror like to highly diffuse.

What I need to do, however is create a new .sbsar file from scratch and have at least that parameter (though hue shift would be nice too) exposed so that I can dial in the look in Viz.  The model to which this substance will be applied is an F1 car.  Here's what I have done:

I created a new metallic/roughness substance, made a BitMap node and loaded the UV texture for the car into it.  I have connected this node to the Base Color and Metallic nodes, and frankly in this state, it is pretty much what we want.  However, I am unclear as to what I need to attach to the 'roughness' output mode in order to have the ability to expose the roughness parameter when I publish the substance to a .sbsar file.

I feel like I can't find a specific bit of instruction for this because it is a very basic function, but my deadline for this project is super tight, and there are many areas of it which require my time and attention.  I thank you in advance for any help you can give me in uncovering this most rudimentary of secrets.

Cheers,
 - Will

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