Masking Bump maps

V-Ray V-Ray Common Public
1

Hi Guys,

I’m making a simple brick wall that has some plastered areas over it.

1. The first image is of my composite bump (B&W map masked w/ noise) plugged into the diffuse for show. Seems to look like it may work.

2. However, the second image is the bump plugged into the bump which completely disregards the mask.

So, in my case, I don’t want there to be grout lines where the plaster is and I’m not sure how to achieve this?

Anyway, appreciate any help! Thanks,
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1_Bump.jpg
1_Bump.jpg1339×219 75.9 KB

2_Bump.jpg
2_Bump.jpg1345×217 78.8 KB

3_Bump.jpg
3_Bump.jpg1617×619 66.7 KB

2

You’ll need a second layer in the composite for whatever is the underlying texture, then the mask will reveal that :slight_smile:

3

Thanks for the quick reply, but I’m not quite understanding still…! I added the underlying texture to the 2nd layer, (I think what this is what you mean? But I’m not sure) but the bump still comes thru. I’ve attached what I’m getting along with the tree.

2_Bump.jpg
2_Bump.jpg1343×303 139 KB
2_Tree.jpg
2_Tree.jpg1266×652 79 KB

4

I deleted the output map just before the bump composite. Everything else is the same

5

That looks a bit odd to me tbh. You seem to have the brick in both layers of the bump with the noise as a mask.
In a simple way it could look like the attached.

3dsmax_CZvpZhUSTQ.jpg
3dsmax_CZvpZhUSTQ.jpg1957×1038 437 KB

6

I had to put a solid white color in layer 2 and mask it with my grout being the base. Probably wouldn’t of figured that out without your example! Thanks!

7

No problem. Depending on what you need to happen the shader could be a LOT more complex/confusing, so it can be easy to become lost in it.
At least now you know the general approach :slight_smile: