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Last updated on 2024年5月22日

How do you optimize your zbrush models for real-time rendering in Unity?

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Zbrush is a powerful tool for creating high-resolution digital sculptures, but how do you make them look good in a real-time engine like Unity? In this article, you will learn some tips and tricks to optimize your zbrush models for real-time rendering in Unity, without sacrificing quality or detail. You will also learn how to export your materials and lighting from zbrush to Unity, and how to adjust them for the best results.

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1 Reduce polygon count

One of the main challenges of real-time rendering is to keep the polygon count of your models low enough for the engine to handle smoothly. Zbrush models can have millions of polygons, which can cause performance issues and long loading times in Unity. To reduce the polygon count, you can use zbrush's decimation master plugin, which simplifies your mesh while preserving the shape and details. You can also use zbrush's zremesher tool, which creates a new topology for your mesh with fewer polygons and better flow. You can then project the details from the original mesh to the new one using zbrush's projection tool.

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Felix Vasquez Brito [MBA]?
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Seamos Honestos, Zbrush no es un programa de modelado modesto, suele estar bastante cargado el contenido. Y mucho de esto depende del dispositivo final del usuario, Unity se debe adaptar a las especificaciones técnicas del hardware. Por ende, limitar la calidad del contenido sería absurdo, en caso de necesitar Lods, se fabricarán ba dados en ello. No te límites como artista, hoy en día el número de polígonos importa muy poco comparado al shader que se utiliza debido a su importancia en el render en Runtime. Es recomendable hacer prototipos de formas sencillas antes de volvar los datos a Unity.

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2 Create normal maps

Another way to optimize your zbrush models for real-time rendering is to create normal maps, which are textures that simulate the surface details of your mesh without adding extra polygons. Normal maps can make your models look more realistic and detailed in Unity, especially when combined with other maps like diffuse, specular, and ambient occlusion. To create normal maps, you can use zbrush's multi-map exporter plugin, which allows you to export multiple maps at once from your zbrush model. You can also use zbrush's surface noise tool, which lets you add fine details and patterns to your mesh and bake them into normal maps.

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Felix Vasquez Brito [MBA]?
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De Normales De Alturas De Oclusión Ambiental De emisión de Brillo De luces Bakeadas De reflejo si es necesario y No olvides nunca el mapa Compuesto en caso de tener más experiencia en dise?o. Ayuda a tus programadores o impresores a acelerar su trabajo.

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3 Export materials and lighting

Zbrush has a variety of materials and lighting options that can enhance the look of your models, but they are not compatible with Unity's shaders and lighting system. To export your materials and lighting from zbrush to Unity, you need to convert them into image files that Unity can read. You can use zbrush's BPR render tool, which renders your model with the materials and lighting you have applied, and saves the result as a texture map. You can also use zbrush's lightcap tool, which lets you create custom lighting environments for your model and export them as spherical harmonics maps.

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Felix Vasquez Brito [MBA]?
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Está pregunta está mal colocada, a menos que configures tu composición en ZBrush en HLSL para los Shaders la luz que verás será siempre diferente al Pipeline de Unity Podrás portear FBX en URP, o HDRP teniendo un gran control sobre el entorno, la luz y el ambiente, tendrás Shaders en Shader Graph que hace HLSL mediante Visual scripting y te podrás a?adir efectos novedosos. Pero exportar lo que tienes en Zbrush, es un sue?o más, mucho mejor sería texturizar en Substance Painter y dejar un resultado más prolijo.

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4 Import models and maps to Unity

Once you have exported your models and maps from zbrush, you need to import them to Unity and set them up for real-time rendering. You can drag and drop your files into Unity's project window, and adjust the import settings according to your needs. You can also create materials in Unity and assign them to your models, and apply the maps you have exported from zbrush to the corresponding slots. You can also adjust the lighting settings in Unity, and use the spherical harmonics maps you have exported from zbrush to create realistic ambient lighting for your models.

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5 Optimize quality and performance

After you have imported your models and maps to Unity, you can optimize the quality and performance of your real-time rendering by tweaking some settings and options. You can use Unity's LOD system, which lets you create different versions of your models with different levels of detail, and switch between them depending on the distance from the camera. You can also use Unity's occlusion culling system, which lets you hide the parts of your models that are not visible to the camera, and save rendering resources. You can also use Unity's quality settings, which let you adjust the resolution, anti-aliasing, shadows, and other features of your real-time rendering.

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6 Test and preview

The final step of optimizing your zbrush models for real-time rendering in Unity is to test and preview your results. You can use Unity's game view, which lets you see how your models look in the game mode, and check for any errors or issues. You can also use Unity's scene view, which lets you see how your models look in the editor mode, and make any changes or adjustments. You can also use Unity's profiler tool, which lets you monitor the performance and statistics of your real-time rendering, and identify any bottlenecks or problems.

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7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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How do you optimize your zbrush models for real-time rendering in Unity?

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1 Reduce polygon count

2 Create normal maps

3 Export materials and lighting

4 Import models and maps to Unity

5 Optimize quality and performance

6 Test and preview

7 Here’s what else to consider

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