Let's discuss USDZ Converter in details...

Also I am wondering whether we can:

- Make Double Sided per Mesh

- Make Subdivision per mesh

- Combining USDZ via USDA

First of all, to use "USDZ Converter" ensure you have latest XCode 10, and Command Line Tools installed so you can run this inside Terminal:

xcrun usdz_converter <obj, alembic, usda you want to convert> <usdz file>

USAGE:

<inFilePath> <outFilePath> [options...]

Options:

-g groupName [groupNames ...] Apply subsequent material properties to the named group(s).

-m materialName [materialNames ...] Apply subsequent material properties to the named material(s).

-h Display help.

-a Generate a .usda intermediate file. Default is .usdc.

-l Leave the intermediate .usd file in the source folder.

-v Verbose output.

-f filePath Read commands from a file.

-texCoordSet set The name of the texturemap coordinate set to use if multiple exist (no quotes).

-opacity o Floating point value 0.0 ... 1.0

-specularColor r g b Floating point values 0.0 ... 1.0

-useSpecularWorkflow i 0 for false, non-zero for true

-color_map filePath

-normal_map filePath

-emissive_map filePath

-metallic_map filePath

-roughness_map filePath

-ao_map filePath

-color_default r g b a Floating point values 0.0 ... 1.0

-normal_default r g b a

-emissive_default r g b a

-metallic_default r g b a

-roughness_default r g b a

-ao_default r g b a

(*) Specify infield only with -v (Verbose) to display group information.

(*) '#' in the first character position of a line in a command file interprets the line as a comment.

usdz_converter has interesting feature like:

-f filePath Read commands from a file.

I am new to this hypen tagging command and using it to "override" Materials and assigning Shader Maps. But really handy after all.

We can apparently supply multi lines commands like this (I am using Sublime Text), we don't even need to worry about using forward slash to separate lines. This is cleaner and easier to work with.

PBR Shader Map texture can have "Alpha" I tested it works.

But not sure how to enable "Double Sided". Also I wonder what these below is for because they do not have effect: (all this color_default, normal_default, emissive_default, etc)

I am using XCode 10 Beta 5 and waiting for Beta 6.

Thanks, nice info, Im following this thread.

Some more stuff from Stackoverflow in case its needed.

https://stackoverflow.com/questions/51009105/how-to-create-a-usdz-animation#_=_

Hi guys, I'm struggling to get the converter working. Whenever I start to convert for example an obj file, the converter tells me that it succeeded. But actually the created usdz file is not showing up, what am I missing?

Has the converter changed in Xcode 10? I can't add textures anymore. It says the converter is now version 1.008.

xcrun usdz_converter obj_path usdz_path -g Mesh -color_map texture_path -roughness_map roughness_path

Hi Yojimbo,

We are having an issue with a USDZ file displaying on older devices. You can view the file here: https://www.noplacelike.co. It's the "Michael Murphy" sofa. It's 33k poly with 2k textures yet still doesn't display on older devices. It was made using Maya and substance painter.

Does anyone know why this will not work?

Thanks,

Allen

Great to find some discussion on USDZ!

I've found AR Quicklook to be fantastic, I've been testing it out in Safari using the rel="ar" command.

It feels a bit unstable still... about 5% of the time it won't load the object and displays this message "Preview Universal Scene Description (Mobile)". If you cancel out and reload, works fine. Have tried with different complexities, doesn't seem to make much difference. At first I thought maybe the webserver was causing issues, but have replicated this using local files on the device.

Anyone else had this issue? I'd be keen to know if it is something I can fix.

Other bits of information I've discovered through testing that people might find interesting:

• AR Quicklook has a draw distance, so if you move an object too far away or make it huge, it will clip.
• It also automatically 'grounds' the object, so if you want something to float, you need to add a small object below to hack this feature.

Wixted, could you post more specifics of the problem you're having? (And/or file a bug)

Which devices? Which OS version? What happens?

FWIW, the Michael Murphy sofa loaded ok for me on an iPhone 7 with iOS 12.

Wondering about Multi UV support, this is the main issue for me currently with USDZ, I have a SCN pipeline now with an OSX tool I created that allows for 8 UV Maps per mesh.... for realtime optimal assets this is essential, wondered if you had attempted it yet?

Hi Guys,

USDZ format supported by apple is really cool. For quicklook we need to provide only the file and the work is done. I got success in showing the model with animation in usdz format. Only the greatest drawback that is the size of the file is too heavy. Could some one help me in reducing the size of the usdz file. as the fbx or dae file format size is too small (i.e in 2-3 MB) while the usdz file is (60-100 MB).

Please help me bagoria2011@gmail.com.

Hey Yojimbno,

I was wondering if you could shed more light on the results regarding using materials other than the standard PBR one.

I only have an ambient texture (applied through the -color_map command), but once converted to USDZ, all objects look way too dark.

You mentioned you use the -f feature to access a file and "override" the materials.

Maybe that solved the issue for you, but I could not find any information on this anywhere..

Best regards,

André

I`m trying to set the materials through -m <nameOfTheColor> <path> but is not working , my line of code is like this

xcrun usdz_converter /Users/mac013dw/Desktop/*****\ cor/export/testeobj.obj /Users/mac013dw/Desktop/*****\ cor/export/testeobjtestecor.usdz -v -m /testeobj/Materials/Jeep_Cor_229_31_31_0 -color_map /Users/mac013dw/Desktop/*****\ cor/export/vermelho.jpg -m /testeobj/Materials/Jeep_Cor_221_124_15_0 -color_map /Users/mac013dw/Desktop/*****\ cor/export/verde.jpg -m /testeobj/Materials/Jeep_Cor_115_148_64_0 -color_map /Users/mac013dw/Desktop/*****\ cor/export/laranja.jpg

can someone help me with that?

Something that I found out : using that code i posted above, when I preview the usdz file in the PC it appear without the colors I assigned to each material, but on the iphone it shows correctly.