UNITY AMBIENT LIGHT HOW TO

Here it will intensify the shadows between the walls.I have a billboard shader but the problem is that my billboard planes are always bright whether ambient light is black or white. Enable “Ambient Occlusion” to intensify shadows cast by objects within the scene.Deactivating “Compress Lightmap” solves the problem of light banding that can occur when light from an emitter fall on an object.Lightmap Size can be reduced (in this case to 512) for a smaller scene which will reduce the file size without affecting the quality of light rendering.Increasing Lightmap Resolution and Lightmap Padding will create a more smoothly lit scene.Set the Lightmapper to “Progressive CPU”.In Lightmapping Settings you can make the following changes,.In the Lighting settings, deactivate Realtime Global Illumination and make sure Baked Global Illumination is enabled.Hence, we need to change the Skybox Material to “None” and then change the Ambient Color to black (to indicate no ambient lighting). The only light should be from the light-emitters within the room. Since it is an indoor scene, there should not be any external or “environment” lighting.In order to tweak the lighting properties further we need to pull up the Lighting Settings.In Baked lighting the illumination is pre-calculated and does not change during gameplay.

We need to go back to the Materials Inspector for each cube and change the Global Illumination from “Real Time” to “Baked”.This means that using the information provided, Unity will start to calculate and then construct the effects of the illumination into a “lightmap” (by tracking the paths of the light rays from the cubes) for the scene. This tells Unity that the objects, in this case the walls and the cubes, will not move during gameplay which allows Unity to begin “baking a lightmap”. Select the objects and enable Static in the Inspector.

Baking a Lightmap: The room and the light emitting objects all need to be static (or non-moving) in order for the lighting to work.

Note: Any object can be made to emit light within a scene by adding an emissive material to it. Adjust the size of the cubes and position them around the room.

Create three duplicates of the Cube, and three different colored Materials.

Then drag the Material from Assets on to the Cube. You can also adjust the amount of emission.

Enable “Emission” in the Inspector and choose the color you like.

Materials define how the surface of an object should be rendered. The scene should look quite a bit darker now.

Since the room is going to be illuminated from inside, we can delete or deactivate the Directional Light.

Insert a Cube (3D Object) from the GameObject menu.

We are going to create four light emitting cubes within the room. Putting all the planes together in one Empty GameObject, renamed “Room”, will help keep things organized.

You should have a cube that you can see into as you rotate your view around it.

Rotate them individually and position them to create four walls and ceiling for the room.

Insert a Plane (3D Object) from the GameObject menu.

For this exercise we are going to make the emissive objects be the only source of light within the room.

UNITY AMBIENT LIGHT HOW TO

This exercise will show how to make objects inside a room emit light and the basics of working with emissive material in Unity to create indoor illumination. Illumination Through Light Emitting Objects in Unity 3D

Unity ambient light