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Enhancing Ray Tracing for MetaHumans: Fixing Eyelash Transparency Issue

Are you encountering transparency issues with eyelashes in your ray tracing project involving MetaHumans? The use of hair cards may be causing blocky shadows when ray tracing is enabled. Fortunately, there's a simple solution to resolve this issue. Let's delve into how you can enhance the rendering of MetaHumans with ray tracing by addressing the eyelash problem.

Understanding the Issue

When working with MetaHumans and utilizing hair cards for eyelashes, you may notice undesirable shadow effects due to transparency issues in the ray tracing process. These shadows appear blocky and can detract from the overall visual appeal of the character.

Steps to Fix the Eyelash Shadow Effect

To rectify the blocky shadow effect caused by eyelashes when using ray tracing with MetaHumans, follow these steps:

  1. Access the MetaHumans Folder: Locate the MetaHumans folder in your project directory.

  2. Navigate to the Face Mesh Blueprint: Select the specific character within the MetaHumans folder and access the Face Mesh Blueprint.

  3. Adjust LOD Settings: In the Face Mesh Blueprint, focus on the Level of Detail (LOD) settings to customize the rendering for optimal results.

  4. Identify the Eyelash Section: Determine the section responsible for defining the eyelashes within the LOD settings. In this case, it may be labeled as section six.

  5. Disable Shadow Casting: To eliminate the blocky shadows cast by the eyelash hair cards, navigate to the settings for section six and disable the option for casting shadows.

  6. Save and Process: After turning off shadow casting, save your changes and allow the Unreal Engine to process the modifications.

  7. Verify the Outcome: Close the settings window and observe the enhanced rendering of the MetaHuman character without the blocky shadows caused by eyelashes.

By following these steps, you can ensure that your MetaHumans render flawlessly with ray tracing enabled, providing a more visually appealing experience for your project.

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If you found this guide helpful in optimizing your MetaHumans for ray tracing, consider subscribing to receive weekly videos on Unreal Engine. Stay tuned for additional tutorials and programming insights to enhance your projects. Thank you for watching and happy rendering!

Meta description: Learn how to address transparency issues with eyelashes in MetaHumans for ray tracing projects. Follow simple steps to enhance rendering quality. Subscribe for more Unreal Engine tips!

Keywords: MetaHumans, ray tracing, transparency issues, hair cards, Unreal Engine, rendering quality, shadow casting, LOD settings

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