# Painting with roughness and metalness and keep the color untouched

**URL:** <https://forum.nomadsculpt.com/t/painting-with-roughness-and-metalness-and-keep-the-color-untouched/2740>\
**Category:** Feature Request\
**Created:** [May 11, 2021, 12:55pm UTC](https://forum.nomadsculpt.com/t/painting-with-roughness-and-metalness-and-keep-the-color-untouched/2740 "2021-05-11T12:55:49Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![Alex](https://dub1.discourse-cdn.com/flex005/user_avatar/forum.nomadsculpt.com/alex/32/2794_2.png) [@Alex](https://forum.nomadsculpt.com/u/Alex)\
**Post date:** [May 11, 2021, 12:55pm UTC](https://forum.nomadsculpt.com/t/painting-with-roughness-and-metalness-and-keep-the-color-untouched/2740/1 "2021-05-11T12:55:49Z")

</div>

I was wondering, is there a way to paint on object only with material roughness and metalness without disturbing the color?

For example: I have an object fully painted with nice colors which are blended and now I want to add a little shinyness to some parts but I can’t do that without applying new color because it is assigned to roughness and metalness. Or maybe there is a way and I didn’t find it?

---

<div class="post-metadata">

**Author:** ![Dface\_Lesh](https://dub1.discourse-cdn.com/flex005/user_avatar/forum.nomadsculpt.com/dface_lesh/32/3794_2.png) [@Dface\_Lesh](https://forum.nomadsculpt.com/u/Dface_Lesh)\
**Post date:** [May 11, 2021, 1:55pm UTC](https://forum.nomadsculpt.com/t/painting-with-roughness-and-metalness-and-keep-the-color-untouched/2740/2 "2021-05-11T13:55:37Z")

</div>

You can add layer and edit in layer option (with that 3 dot call channel factors ). Remove color

Or you can go color shortcut and uncheck color

---

<div class="post-metadata">

**Author:** ![stephomi](https://dub1.discourse-cdn.com/flex005/user_avatar/forum.nomadsculpt.com/stephomi/32/19583_2.png) [@stephomi](https://forum.nomadsculpt.com/u/stephomi)\
**Post date:** [May 11, 2021, 4:25pm UTC](https://forum.nomadsculpt.com/t/painting-with-roughness-and-metalness-and-keep-the-color-untouched/2740/3 "2021-05-11T16:25:37Z")

</div>

> [@Dface\_Lesh](#):
>
> Or you can go color shortcut and uncheck color

Yes this is the solution, use channel masking.

However it doesn’t work with layers but in the future it will.

> [@Dface\_Lesh](#):
>
> You can add layer and edit in layer option (with that 3 dot call channel factors ). Remove color

Yes it should work in this case.  
But for a more complex scenario (in-between value of the channel factors), you’ll see it fails when merging layers.  
It fails for the same reason why channel masking is not available for layers (the reason is that for now color/metalness/roughness are sharing the same per-vertex opacity channel instead of having their own).

---

<div class="post-metadata">

**Author:** ![Dface\_Lesh](https://dub1.discourse-cdn.com/flex005/user_avatar/forum.nomadsculpt.com/dface_lesh/32/3794_2.png) [@Dface\_Lesh](https://forum.nomadsculpt.com/u/Dface_Lesh)\
**Post date:** [May 11, 2021, 5:05pm UTC](https://forum.nomadsculpt.com/t/painting-with-roughness-and-metalness-and-keep-the-color-untouched/2740/4 "2021-05-11T17:05:08Z")

</div>

> [@stephomi](#):
>
> But for a more complex scenario (in-between value of the channel factors), you’ll see it fails when merging layers.  
> It fails for the same reason why channel masking is not available for layers (the reason is that for now color/metalness/roughness are sharing the same per-vertex opacity channel instead of having their own).

Well you already tweak and test about how each layer compress/uncompress for next update? No?  
so didn’t merge layer would be the solution in this cases.😄

And most people who using layer doesn’t merge the layer I think 🤔 unless they are sure that it’s already good.  
Or unless it’s same object with same color and shape.  
Although my self prefer not to merge if could. 😄

Layer is very useful to prevent wrong doing. So doesn’t need to undone a lot time or redo everything. Delete the wrong layer and make new one without effect other thing in the object.  
Or open old project to do some edit.  
😄

---

<div class="post-metadata">

**Author:** ![Alex](https://dub1.discourse-cdn.com/flex005/user_avatar/forum.nomadsculpt.com/alex/32/2794_2.png) [@Alex](https://forum.nomadsculpt.com/u/Alex)\
**Post date:** [May 12, 2021, 2:07pm UTC](https://forum.nomadsculpt.com/t/painting-with-roughness-and-metalness-and-keep-the-color-untouched/2740/5 "2021-05-12T14:07:57Z")

</div>

Thanks guys. It’s exactly what I’m looking for.