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We are working with USDZ files and are having trouble with contact shadows especially with transparent objects.

Questions:

1) Is there a way to turn off contact shadows?

The AR Quick Look presentation in WWDC says there is a way to turn off contact shadows, but I'm unable to find any documentation on how.

2) Should contact shadows in the case of transparent objects be handles differently?

Here's a capture of a wineglass object:

enter image description here

Here you can download USDZ model.

enter image description here

Update 20/Nov/2018: I have a bug report with Apple for this feature: https://bugreport.apple.com/web/?problemID=46180332

Update 22/Mar/2019: Answered as well. Looks like this is now fixed in iOS 12.1.4.

Jai Ramamirtham
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    I would try running the USDZ building command with `-h` to see if there are any clues in there. If there aren't any then you can use a support ticket to get a quick reply from Apple. You get two for free every year with your Developer Account. – EmilioPelaez Oct 22 '18 at 15:51
  • Doesn't look like there is an option here: – Jai Ramamirtham Oct 24 '18 at 08:11
  • xcrun usdz_converter -h -g groupName [groupNames ...] -m materialName [materialNames ...] material(s). -a usda file -l Leave intermediate -v verbose -f filePath -texCoordSet -opacity -specularColor r g b -useSpecularWorkflow i -color_map filePath -normal_map filePath -emissive_map filePath -metallic_map filePath -roughness_map filePath -ao_map filePath -color_default r g b a -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 – Jai Ramamirtham Oct 24 '18 at 08:17

1 Answers1

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Looks like this has been fixed in iOS 12.1.4.

AR Quicklook on iOS 12.1.4

Jai Ramamirtham
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