Curve and UV map + PBR

Support Modeling
1

i tried to add a UV map for a twisted wire on a curve with PBR node
and don’t get the render to work

here is nodes

can someone help to get this working

zzuv1
zzuv11396×680 105 KB

UV map is this

zz-wire-meshdata
zz-wire-meshdata2652×368 82.4 KB

thanks
happy bl

2

I (not really knowing) don’t think Curves really have UV’s but may this will help.

https://blender.stackexchange.com/questions/126275/see-uvs-for-beveled-curve-in-uv-image-editor

3

i did it in 2.79
and cannot get it to work even after looking at the tut !

tried it in 3.1 and it is beginning to work
but not all around only a small portion is uv map

can you explain why it is not working ?
in 3.0 i don’t see the use uv mapping
where is it now ?

when they say to use location and scale that is the one in the curve panel is it ?

in bl 3.0

zzz1
zzz1716×492 46.9 KB

not looking good at all !

thanks
happy bl

4

in 3.1 it is beginning to work
but very strong distortion on vertical curve

zzz2
zzz21229×694 83.5 KB

is there anything to correct that ?

now in 2.79 not working at all !

thanks
happy bl

5

I’ve been looking, I havn’t seen anything really… How did you do that? I was thinking though, you could make a mesh cylinder and put a lot of geometry on in and bend it with a curve so you would not have to deal with the curve UV’s

6

i need several curving curve for some wires
so much easier to do with curves and UV then doing it with mesh

now for 2.79 cannot make it work
but doe seem to work in 31

so very strange why this is not working in 2.79

i will have to re make my original file in 3.1
and be able to use curves + UV instead of mesh

thanks
happy bl

7

Ahem… and why do you use generated instead of UV ?? (shown in 3.0 also tested in 3.1)

screenCurveUV
screenCurveUV1234×779 77.8 KB

And also why using a new texture node with the same texture again for bump but no mapping??

8

this first image was first quick test which i change to follow tut

the tut seems to show to use the generated mapping
not certain why?

are you saying that it should be UV mapping ?

at least now it is beginning to work
mind you the 3D effect is minimal

will try to find a more high res photo

did you test it under 2,.79
it still does not work for me only in 3.1

thanks
happy bl

9

It seems to be that in 3.0 you don’t need use UV anymore because it’s the default (Auto Texture Space)?
curveUV279.blend (99.0 KB)

Did a test in 279 have to scale y=0.1 …
curveUV279.blend (99.0 KB)

10

check this one out
image is not added in 2.79

Oki-curveUV279-2.blend (91.7 KB)

zzz3
zzz31100×692 47 KB

also in 3.1
the scale value are extremely sensitive
have to manually adjust the number instead of using the scroll button

thanks
happy bl

11

I think i remember now: 279 was extremly picky fro me about showing the correct texture if used cycles… that’s the reason why i used internal for a much too long time… if you change to Rendered then you can see it…
But for your wire… that’s what i didn’t understand using UV for genereated… button if you use UV and not rendered in the texture coodinate node then it works… (maybe that’s also the reson why it disapeared… makes no sense ?? :crazy_face: )

12

looks to me like a bug

anyway as it works better in 3.1 i will port my original file into 3.1 and keep going with 3.1

have to get use to 3.1 now LOL

only thing i still have to better understand are the new geom node
much more complicated then the old modifiers stack

thanks
happy bl