Скачать или смотреть How to Fix No Shadows in Unity Objects

Struggling with shadows disappearing in Unity when applying textures? Discover effective solutions and techniques to achieve beautiful lighting and shadow effects in your Unity projects.
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This video is based on the question https://stackoverflow.com/q/62249615/ asked by the user 'Saif Manwill' ( https://stackoverflow.com/u/10725241/ ) and on the answer https://stackoverflow.com/a/62250288/ provided by the user 'Florian Wolf' ( https://stackoverflow.com/u/11257746/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding the Issue: No Shadows in Unity Objects

Have you ever found yourself struggling with shadows disappearing when you apply a texture to your objects in Unity? You're not alone! This is a common problem faced by many game developers, and it can be quite frustrating. In this guide, we will explore the reasons behind this issue and provide you with practical solutions to ensure your objects are both visually appealing and properly lit.

The Problem Explained

The core issue arises when you change the shader of your material to Unlit. As the name implies, materials using an Unlit shader do not react to any lighting in the scene. This means that they won't cast or receive shadows, leaving your objects looking flat and lifeless.

Key Points:

Unlit Shader: Materials do not respond to lighting; hence, they lack shadows.

Visual Impact: The absence of shadows can make your scene look unrealistic and dull.

Exploring Solutions

Fortunately, there are several solutions to this problem. Below, we discuss two practical approaches that can enhance the appearance of your objects while ensuring that shadows are still cast.

1. Utilize a Cel Shader

If you're aiming for a cartoonish or flatter aesthetic while keeping the benefits of shadows, a Cel Shader is a great choice. This type of shader can provide a unique visual style while still allowing your objects to interact with light and cast shadows.

How to Create a Cel Shader in Unity:

Use Shader Graph: A powerful tool that allows you to create shaders visually without writing code.

Google "Cel Shader Unity": You'll find various guides that can guide you in creating a custom cel shader tailored to your project.

Experiment with Settings: Adjusting the parameters can help you achieve the perfect look for your game.

2. Implement a Lightmap PNG File

Another method to tackle the issue is by using lightmaps. Lightmaps are pre-calculated textures that provide shadows and lighting information, effectively enhancing the visual quality of your scene.

Steps to Utilize a Lightmap:

Create a Lightmap: Use rendering techniques in Unity to generate a lightmap texture for your scene.

Apply the Lightmap: Assign the lightmap PNG to your objects which can help in casting shadows without altering the material too much.

Optimize Performance: Make sure to optimize lightmap settings for better performance during game play.

Conclusion

Dealing with the "No Shadows in Unity Objects" problem can be quite challenging, but with the right techniques, you can enhance the visual quality of your projects significantly. By utilizing cel shaders or implementing lightmaps, your objects can receive the beautiful lighting and shadows that they deserve.

If you have further questions or more tips to share, feel free to leave a comment below. Happy developing!