UV–Spot Effect

To get a quick introduction to the effect, search for UV–Spot or UV coating if you never heard about this before. This effect is quite popular for business cards and book covers, so let’s try making it in Boxshot.

We’ll be making a business card using this texture:

Sample texture for UV-Spot business card

And we want our UV–spot decoration to be this one:

Sample texture for UV-Spot pattern

Ready? right–click the two images above and save them to your computer, and let’s start!

Make a simple business card

Run Boxshot and drop a simple business card shape into the scene:

Adding business card to Boxshot project

Then drag the main image onto the card, click the “Fit to images” button, and adjust the camera to fit the card onto the screen:

Applying artwork to business card and configuring its size and camera

Adjust the material

Now you need to make some changes to the default business card material:

Making changes to the default business card material

Here’s what you need to do:

You can adjust more options to make the card looking even more realistic if you like.

That’s how you usually do business cards in Boxshot. But we’ll go further with our uv coating mask.

Add UV–Spot effect

The effect itself is all about rough and smooth surfaces. We use Roughness parameter in Boxshot to make the surface rough, so let’s set it to 70% and see what happens.

70% roughness of the business card material

Note that preview displays a very draft quality image, so you might want to do some renderings in order to see the real changes of the actions you will do below.

Now let’s change the roughness to 5% and see the difference:

5% roughness of the business card material

You should start getting the idea: basically all we need to simulate the UV–spot effect is to make some parts of the card smooth and glossy and other parts rough. Here comes the second texture: the UV–spot mask we mentioned above.

Let’s load it into the Roughness mask slot and set the roughness level back to 70%:

70% roughness and roughness mask in Boxshot

Looks interesting, right? The black parts of the UV–spot mask give us a completely glossy surface, while the white ones give us a rough surface: the texture brightness is multiplied by the roughness level and used as a new roughness level for each pixel of the card.

Now we need to invert the UV–spot mask to make the text glossy and then add the main “the boss” text to it, to make it glossy as well. Here’s the new UV–mask:

Inverted UV-Spot mask with the text we need

Finally, load the new mask into the Roughness mask slot and see the UV–coated card in preview:

Our scene with updated roughness mask

Feel free to do a draft or even production rendering here to see the better quality image.

Further improvements

The UV–coated ornament has strong and sharp reflections, so you may want to reduce them a bit. To do so you need to make the black parts of the UV–spot mask gray to blur the reflection.

Here is the new mask:

Softer UV-Spot mask

Notice that the letters are now gray instead of black. Let’s load the new mask into the material:

Using softer roughness mask for better UV-Spot effect

Now it looks much better. Let’s add some bump to make the coated text more visible. We’ll need our initial black UV–spot texture with the main text and some blur:

Bump map to add some relief to the UV coated business card

Load this texture into the Bump texture slot of the material and check the output:

The business card with applied UV-Spot and bump effects

Once again, you might want to render the scene to check the effect properly.

That’s all

OK, so you’ve just learned how to use roughness and bump to create UV coating effect in Boxshot. Why don’t you try to make your own material now?

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