# How to use Projector Widget?

Go to Menu > Preference > Widget, and you can check what you have installed, click to toggle on/off and manage your widgets.

<figure><img src="https://3611830798-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MjbN1iGmN_HBnj_fyU9%2Fuploads%2FBGFB24WvpiWdwsrBDP2m%2Fimage.png?alt=media&#x26;token=83822fd5-e577-40bf-aade-2665353045e1" alt=""><figcaption><p>Projector Widget</p></figcaption></figure>

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Go to Menu > Preference > Widget to activate Projector, and insert it into the scene from Navigation bar > Add lights

<figure><img src="https://3611830798-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MjbN1iGmN_HBnj_fyU9%2Fuploads%2FqjyV5IyZNu6y2cp8r1gy%2Fimage.png?alt=media&#x26;token=02a91f5d-f504-4996-9b49-904812444981" alt=""><figcaption><p>Projector </p></figcaption></figure>

Projector is a new type of light source which has a rectangular projection effect. It supports image formats including jpg/png/bmp and video formats including mp4/avi/wmv. After adding a projector to the scene, we can adjust its parameters in Inspector.

<figure><img src="https://3611830798-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MjbN1iGmN_HBnj_fyU9%2Fuploads%2FxTnOIEXLM2BV656PFBX7%2Fimage.png?alt=media&#x26;token=90253959-e138-4367-920d-ecfc9dd3c69a" alt=""><figcaption><p> Inspector</p></figcaption></figure>

* Video: Customized pattern can be uploaded to determine the projection screen.
* Intensity: The luminous intensity of the light source in cd (candela), the maximum brightness can be entered 8000000.
* Cone Angle: Control the cone angle range of the projector's light emitting cone. The cone angle parameter allows you to control the feedback of the projection pattern.
* Attenuation Radius: Limit the range of influence of the light source. Within this range, the light fades according to the normal inverse square law, and beyond this range, the light calculation stops.
* UV: Control the position or size of the image or video within the projection.
* Haze: To create a Haze effect, we need to turn on Volume Light in Environment - > Weather - > Fog beforehand.

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### FAQs <a href="#toc-h2-faq" id="toc-h2-faq"></a>

#### 1.Why are the Stage Lights effect abnormal? <a href="#header-2" id="header-2"></a>

The maximum number of the Stage Light/Projector is 64, if it exceeds the change limit it may cause abnormal preview or output effect.

#### 2.Why the specular reflection Stage Light/Projector effect is not shown in the rendering result? <a href="#header-3" id="header-3"></a>

This effect is not supported in the current version and will be supported in subsequent versions.

<figure><img src="https://3611830798-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MjbN1iGmN_HBnj_fyU9%2Fuploads%2FKuT8Ux6juu0cF0Aok1da%2Fimage.png?alt=media&#x26;token=2d41e11a-6246-4976-81b5-bbef9d5d4511" alt=""><figcaption><p>Preview and output effect of the current version of Mirror Reflection Stage Light/Projector</p></figcaption></figure>