Author Topic: Creating a Roughness Map for Keyshot  (Read 2107 times)

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Offline daviddenton

Creating a Roughness Map for Keyshot
« on: February 23, 2021, 03:36:58 am »
I am relatively new to Keyshot and digital sculpting and I own Zbrush, Keyshot 7, and Photoshop.

I want to be able to create a map that will allow me to precisely define the degree of roughness in different parts of a model. For example, I may want the area around the eye on a face to be smoother, the skin on the cheek slightly rough, and the skin on the chin even rougher.

I tried creating a map by polypainting black, white, and grey on a face that had a UV. I turned this polypainting into a texture map. When I tried to apply this to the same model in Keyshot in the material graph to drive the roughness, I couldn't get the texture to wrap properly around the model.

Am I going about this the completely wrong way or am I on the right track? Any help would be gratefully received.

Offline Zeltronic

Re: Creating a Roughness Map for Keyshot
« Reply #1 on: February 23, 2021, 04:54:36 am »
Hi, just check by selecting your texture in mat graph that UV mapping is selecting (default is box if that is the case just change to UV).
As a reminder black=no roughtness white=full roughtness.

Offline daviddenton

Re: Creating a Roughness Map for Keyshot
« Reply #2 on: February 23, 2021, 06:32:49 am »
Thanks for the reply. I changed it to UV and everything was just black. There were none of the white areas left. I'm not sure whether I created the map properly in ZBrush.

Offline daviddenton

Re: Creating a Roughness Map for Keyshot
« Reply #3 on: February 23, 2021, 06:52:01 am »
If this helps to work out what I'm doing wrong, here are two screenshots plus the UV texture map. For this test, I'm trying to create a rough skin with smooth eyes. You can see that everything is just black when I do the preview color option on the texture map.

Offline Zeltronic

Re: Creating a Roughness Map for Keyshot
« Reply #4 on: February 23, 2021, 08:50:36 am »
Set those parameters to 1 it should solve your trouble ....;)

Offline daviddenton

Re: Creating a Roughness Map for Keyshot
« Reply #5 on: February 23, 2021, 11:29:14 am »
That's fantastic, thanks. You've opened up a whole new world of possibilities for me.  :)