KeyShot Forum

Technical discussions => General discussion => Topic started by: daviddenton on February 23, 2021, 03:36:58 am

Title: Creating a Roughness Map for Keyshot
Post by: daviddenton 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.
Title: Re: Creating a Roughness Map for Keyshot
Post by: Zeltronic 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.
Title: Re: Creating a Roughness Map for Keyshot
Post by: daviddenton 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.
Title: Re: Creating a Roughness Map for Keyshot
Post by: daviddenton 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.
Title: Re: Creating a Roughness Map for Keyshot
Post by: Zeltronic on February 23, 2021, 08:50:36 am
Set those parameters to 1 it should solve your trouble ....;)
Title: Re: Creating a Roughness Map for Keyshot
Post by: daviddenton on February 23, 2021, 11:29:14 am
That's fantastic, thanks. You've opened up a whole new world of possibilities for me.  :)