Make an object emit light

Game Engine Game Engine Support and Discussion
1

Hi guys,

I know its possible to bake textures for static places in order to gain CPU resources. But if i want an object like a lamp or a screen to emit light that will interact with moving objects (just like a spot, hemi, sun, point) how can i do it in UPBGE ?

I know how to do it in Blender Render engine. But want to do it in UPBGE and dont know how to do it …

I tried but the object is not emitting a light which enlights around

2

In vanilla BGE it seems to work when the shading is on GLSL. But the object is not shining anymore but it emits light

3

You can’t emit real light from objects in the bge.
but as that site says the example should still work, by faking it with a lamp on the same location as your object.

If you just want to emit, then you can use the material setting for it. Or look for an addon, i believe there was an area lights addon somewhere.

4

its because i think its useful to have this : make a lamp asset emitting light (a source of light) , put the asset on many places on your map . Done.

Also, i still don’t understand why light can go through walls. Wonder how i can simply correct this

5

Yup same here, there are a few fixes you can apply.

  1. make objects as real 3d objects, so a wall of let’s say 10 CM thick instead of a thin plane.
  2. fake it by overlaying an roof over the lightbleed effect
  3. bake the lightmap and use that to fake light/dark areas.

few topics to read:

6

thank you very much for this complete answer