Week 12

there are multiple forms of lighting: 

• directional (gives light everywhere but casts shadows in one direction)

• spot (as in spotlight)

• area (needs to be static and can only be baked)

• point 

it's better to delete a skybox altogether when a scene is entirely inside, as it can tint the scene regardless 

a good way to gain full control of lighting is to turn the skybox off, change the background black and environmental lighting to 'color', then switch it to black as well. 

the difference between real-time and baked lighting is that the latter bakes the lighting info into the textures, and is more optimal for efficiency. Realtime is better for when the light moves or changes. 

if you try to mix blue, red and green lights you will end up with a white (works best with spotlights)

before baking lighting, the objects that do not move need to be set to 'static' 

• doing this with the GPU rather than the CPU is faster

• anything that is not static will render as black

• new lights, such as spotlights, will still work normally

always generate lighting for every scene because it ensures that the lighting info for each scene is not transferred over 

only bake when you're happy with the scene and textures - can clear bake data if things need changing