Hi, I thought I should post an update.

In the end I have found that the best and fastest way to map the textures properly is with the help of SketchUV plug-in from Whaat, available at https://extensions.sketchup.com/en/content/sketchuv and that in case it gets complicated, combining the fix from Rob rspierenburg mentioned above in this same thread does wonders.

So a two-level solution for the problem, depending on the disaster grade that your geometry brings to the material

Hope it helps, God knows I have been bugged by this one...

RL.

I have digged a bit more into this, and realized that in order to be able to access to the TEXTURE menu on right mouse click, you need to have a diffuse map applied to the material, any other map will just not count and you will not get the TEXTURE option... Didn't know this fact.

RL.

Hi Rob, to answer your questions:

@rspierenburg said:

A) Are you selecting the actual face? Try turning on "Show Hidden" and select one portion of the curved face, then right-click.

Yes, I usually go to EDIT GROUP then CTRL + A (Which select all the faces) and I apply the mat, but I have tried it face by face. Recently I have discovered tho, that those faces I can access to via the TEXTURE sub-menu when I click the right mouse button, I can fix the bug by simply applying PROJECTED.

Where is this "Show Hidden" option? Do you refer a polygonal selection (and not the whole face)? If so, I do not know where to access to that layer.

@rspierenburg said:

B) Texture size is not determined by Vray Material, but by Sketchup Material size.

Texture size (VRay mats only) can be determined either by Sketchup Material > EDIT Menu as you mention, or also by accessing the VRay Material Editor, going into the texture map we are want to change (diffuse or any other) and play with the values in the very bottom UVW section where it says REPEAT with U and V values (lesser value = bigger texture result) and also the rotation of the texture map.

I tend to adjust the values via VRay Material Editor, since if the material is saved/packed (IIRC) it keeps the property and there is no need to re-adjust the size via Sketchup Material when we use it in a different scene.

Regards,

RL.

Check if you have OVERRIDE VIEWPORT checkbox ticked, otherwise you are limited to what appears in your screen no matter the size you input. Also make sure your Pixel Aspect Ratio is checked to 1.

RL.

Have you tried with a vray double sided material?

Scene Materials > Create Material > Two Sided

Here you can apply a fully different pre-existent material (not just a diffuse map, but with full control) for each different side.

Hope it helps.

RL.

The picture you have uploaded is the reference picture or your render result?

Without two pictures for comparison is difficult to give proper advice, but assuming that what you are after that kind of look and you have indeed the proper texture already, a high glossy reflection layer + choosing the correct size in the REPEAT section of the diffuse layer will be very important to achieve the look.

RL.

Couple more details to mention.

a) Not sure why I do not get the TEXTURE option in the menu after right-clicking the faces, I only get it in the front blue face (indicated in the screenshot).

b) It is curious that even though having applied the same texture (bump details in the screenie), the bump (+ diffuse since is the "fixed" material) appear so different in two sides that have not so different area, 5.13m2 for the square and 4.68m2 for the bird.

Just more data in case leads someone to an answer for this problem.

RL.

Hi Rob,

As promised, I did the check with your technique, and to be fair I was not doing it right the first time.

Here I uploaded two screenies, all materials are using the same bump with different colors in diffuse, I have changed some bump accent and repeat texture but just for the sake of the original being too big so it was clearer for the test this way.

So there are some curious results.

The first screenie shows clearly where the mess comes up, I made that twitter shape using just the curved angles tool plus a final pull to give volume. Curious thing is, that the inner side of the tail looks showing a quite ok bump (on a second thought and checking both render results, it looks quite different on the second one), and even more mysterious, the green element on the right also has a curved angle + couple straight lines + pull and it does not display a messed UVW map.

In here I followed your technique, and as it can be seen the results are positive.

I would like if possible though, to avoid this kind of fixes and get to the heart of the problem. Looks like after some curved shapes + pulling the element, this looses/messes with the UVW map somehow. The question is:

Is there any way in Sketchup to apply a UVW redraw to an element of our scene out of the box (without any plugin)?.

Thanks,

RL.

Hi again.

I think I have found a solution that avoids having to execute any extra steps at the time of creating our materials.

Honestly I was a bit fed up with this issue (like I said, was dragging it from long ago) and decided to take a rest from Sketchyp and give a try to 3ds Max since I used to work with it in the past and I still can model quite effectively there. After updating a few things, I found to my despair that I had the same problem! No need to say this got to my nerves, so I decided to go a bit deeper into the source of the trouble.

Now, I haven't tried yet in Sketchup, but in 3ds Max, the problem was not so difficult to solve after all. Having in account that the issue was mostly in the UVW maps (after trying Mental Ray, also unsuccessfully was quite sure that the problem was not in VRay, I also tried to update my GPU drivers to no avail), so it occurred to me to apply a Modify panel > Modifier List > UVW Map to the meshes and polygons I was working with, with instantly positive results.

I even had a couple hours to draft this scimitar and throw a quick render, sharing it with ya all since I am really happy that I did overcome this problem

Special thanks to Rob for all the effort in explaining me alternate solutions!

Will try if the fix work in Sketchup and report here for future reference if anyone else has this same problem.

RL.

Hey Rob.

Will do as I arrive home at night, thanks for the time you are taking to explain me this )

RL.