# 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 class="doc-image doc-image--stack">
  <img src="https://docs-static.d5render.com/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces/-MjbN1iGmN_HBnj_fyU9/uploads/BGFB24WvpiWdwsrBDP2m/image.png" alt="Projector Widget" />
  <figcaption>Projector Widget</figcaption>
</figure>

---

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

<figure class="doc-image doc-image--stack">
  <img src="https://docs-static.d5render.com/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces/-MjbN1iGmN_HBnj_fyU9/uploads/qjyV5IyZNu6y2cp8r1gy/image.png" alt="Projector" />
  <figcaption>Projector</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 class="doc-image doc-image--stack">
  <img src="https://docs-static.d5render.com/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces/-MjbN1iGmN_HBnj_fyU9/uploads/xTnOIEXLM2BV656PFBX7/image.png" alt="Inspector" />
  <figcaption>Inspector</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.

---

### FAQs

#### 1.Why are the Stage Lights effect abnormal?

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?

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

![image](https://docs-static.d5render.com/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces/-MjbN1iGmN_HBnj_fyU9/uploads/KuT8Ux6juu0cF0Aok1da/image.png)

Preview and output effect of the current version of Mirror Reflection Stage Light/Projector