A simple 3D role of wallpaper

[Chris Heath]

I'm starting to get the hang of Cheetah 3D's units. Having said that it's so easy to forget because I'm not using Cheetah all the time. Here are some of my patterns applied to a 24-inch wide roll of wallpaper created in Cheetah 3D.

I just realised that it's still not quite correct because this is a half-drop pattern, so if the edges were to match, the rolls would have to be offset vertically.

My next challenge is to create some fabric sample mockups and to drape these patterns as a simulated fabric with the patterns and fabric to scale.

 

[frank beckmann]

I just realised that it's still not quite correct because this is a half-drop pattern, so if the edges were to match, the rolls would have to be offset vertically.

I´m not sure it have to, because if it´s made from a spline+Extrude Creator you´ll have full control over the placement in the UV-coord section of the material. (and the spline can be reversed in certain situations.):

 

[Chris Heath]

I´m not sure it have to, because if it´s made from a spline+Extrude Creator you´ll have full control over the placement in the UV-coord section of the material. (and the spline can be reversed in certain situations.):

Thanks Frank.
Yes, it’s an extruded spline.

I’ve set up the roll to replicate a 24-inch wallpaper width and my initial patterns, like the geometric design above is a 4” x 4” unit with a basic repeat. So the wallpaper lines up edge to edge perfectly when the material is loaded up with the 4x4 unit.

The width of the floral unit is 8” and repeated as a half-drop (see artboard on right-side above), which means I need to scale it down to 6” inches wide to get 4 units across the role.

I couldn’t replicate the half-drop effect in Cheetah by adjusting the UVs (see below).

I had to make a 16 inch wide unit with the half-drop built in, similar to the yellow shaded rectangle in the first screenshot above. Currently I have three units across the width of the roll, but need two or four units across for this half-drop pattern to be an accurate representation of the pattern when printed on a roll.

Next time, I’ll design for a 6” unit for print-on demand wallpaper from the start. I can export the 8" pattern as a 6" wide unit and use this 6" unit for both fabric and wallpaper. I can do this for cheetah too, then adjust the UVs for a perfect fit.

BTW, Spoonflower (print on demand service) automatically caters for laying out half-drop patterns. All I need to do is upload the unit (image on left in first screenshot) and select the half-drop button.

Is there a way to offset a repeat unit horizontally for a brick pattern or vertically for a half-drop?
It's not a problem having to make another repeat unit (yellow rectangle) just for cheetah, but it would be good to streamline my design process and reduce the number of steps by using the same image that I upload to Spoonflower.

 

[frank beckmann]

Is there a way to offset a repeat unit horizontally for a brick pattern or vertically for a half-drop?

Unfortunately I have no clue what you´re asking for. Starting at the middle of the seamless pattern?

 

[ZooHead]

I don't understand the workflow process but you can use two Transform Modifiers to make a brick like pattern of objects.

 

[Chris Heath]

Here is the half drop repeated correctly so as to replicate the finished product.

 

[Chris Heath]

I don't understand the workflow process but you can use two Transform Modifiers to make a brick like pattern of objects.

Thanks Eric. That is what wallpaper and textile designers call a half-drop (which is a brick-like pattern rotated 90 degrees). It looks like it’s not possible to do this with UVs, so I have set up another art board in Affinity Designer with the half-drop baked in for exporting and then importing into the C3D texture.

 

[Chris Heath]

Unfortunately I have no clue what you´re asking for. Starting at the middle of the seamless pattern?

A half-drop is like a brick pattern where the unit is repeated and offset 50% to obtain the seamless pattern, just like Eric has done with transform modifiers. It looks like it can’t be done with UVs.

 

[ZooHead]

But I think you can if you make the object I made editable
and by welding it together with the Optimize command.

Now the UVs are also in a brick pattern.

This one is trimmed down.

 

[Chris Heath]

Here is the final image. Although it’s hard to see, a cotton texture has been added as a bump map to the fabric.

 

[ZooHead]

Very nice, I love your patterns and your renders are beautiful.

Here's a much simpler way to make the pattern roll then my previous method.

Starting with two offset 1x2 panels, merging, snapping
together and then optimizing to weld it together.
Then add an Array Modifier...

To get the roll effect use Bend Modifiers after linear subdivision.

 

[ZooHead]

I had to test whether I could simply load another image pattern
and it would map correctly even though the UVs are convoluted.

I created a second material with a simple color change,
and made the "roll" with three Bend Modifiers.

It works, so it could be used as a template for many patterns.

 

[Chris Heath]

I had to test whether I could simply load another image pattern
and it would map correctly even though the UVs are convoluted.

I created a second material with a simple color change,
and made the "roll" with three Bend Modifiers.

It works, so it could be used as a template for many patterns.

.

That looks really cool. I’ll take a look. There are other mock-up templates I want to create, so your approach gives me more options. Thanks Eric.

 

[Chris Heath]

Here are the next items in this mockup series – fabric swatch cards.

Next up will be some folded layers of fabric and fabric hanging from a hook. This might require venturing into using softbody tags. Any ideas on how to do this would be greatly appreciated. I recall Frank's video showing a ball rolling over the Cheetah fabric and the fabric bunching up nicely as a result.

 

[frank beckmann]

I found this in my repository made back in 2015: Quite easy when I recall correctly. Generate the UVs before the simulation makes texturing simple.

 

[Chris Heath]

I found this in my repository made back in 2015: Quite easy when I recall correctly. Generate the UVs before the simulation makes texturing simple.

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I like this! I’m going to give it a go. I’m sure I’ll get stuck along the way. It took me a couple of days to do the swatch cards getting snagged on making the Boolean hole, labels and getting the UV’s to work. This will be a good next step In learning 3D.