UE4 BSP the light source in the brush needs to be rebuilt (x the object is not built)

UE4 List of articles

Preface

stay UE4 When using point light or spotlight light in , Will prompt ：ue4 bsp The light source in the brush needs to be reconstructed （x Object not built ）

One 、 solve

1. The first solution ： Click on “ structure ” Button

Be careful ： When running the game , The build button is grayed out , You must stop running the game before you can build

Two 、UE4 unreal 4 Engine online baking （SwarmAgent）

After the light source is built , One more picture appears in the task manager at the bottom right corner of the operating system , Click open to find that it is related to ue4 Build light source correlation
swarm agent running on laptop-0r30178p
Bake , It plays an important role in game design ！ When the game is running, light rendering has a great impact on performance , Designers to reduce the rendering pressure of lights at runtime , And do not lose too much effect . Added scene baking .

Baking is mainly in the game design stage , By precomputation , Render the light illumination information onto the lightmap . Thus, the illumination calculation will not be carried out for the light in the operation stage , The purpose of using lightmaps for lighting performance . Improved performance , And it doesn't lose too much rendering effect .

Baking itself is very time consuming , Generally, the company will configure multiple hardware monster computers for baking scenes . If you use illusion , Then the baking scene can use online mode to improve the baking speed ！

It's very cool , We can access computers in the same LAN , Bake online ！ To speed up baking ！（ Bake occupancy CPU resources ）

2. The second solution
On the right side “ Elder martial sister outline view ”, Choose “Light Source”, In the bottom “ Fix ” Change to " Movable "

Running effect