Unity-Sprite-Illuminator-Tutorial

Dynamic Lighting with SpriteIlluminator

Normal Maps

A normal mapped sprite consists of 2 files:

![Normal Mapped Sprite: Sprite's Texture](Assets/Demo Pictures/character-with-si-logo.png) ![Normal Mapped Sprite: Sprite's Normal Map](Assets/Demo Pictures/character-with-si-logo_n.png)

The texture itself is used for the sprite's color.

The pixels in the normal map represent a direction - the direction in which the normal vector of a given pixel is pointing. It's encoded into the color channe - this is where the strange color scheme comes from.

The normal maps were generated using SpriteIlluminator - our Normal Map Generator.

Importing Texture and Normal Map

Click at the image in the Hierarchy and set the texture type to "Texture". Make sure to tick "Alpha is transperancy" if you use a transperant texture.
Click at the normal map in the Hierarchy and set texture type to "Normal Map". Untick "Create from grayscale".

Create Material

Create a new Material and set the Shader Type to "Transparent - Bumped Diffuse".
Add the texture as base and the normal map as normal map.

Create Quad

Create a Quad found under "3D Object" and apply the material onto the mesh renderer

Add Lights

With dark ambient light the texture looks like this:

![Normal Mapped Sprite: Only Ambient Light](Assets/Demo Pictures/without lights.png)

Select "Edit - Render Settings" and choose a color as ambient light which is used as base color for the texture.

![Normal Mapped Sprite: Only Ambient Light](Assets/Demo Pictures/with blue ambient light.png)

Add point light to simulate the light of a single source (eg. lamp or fire)

![Normal Mapped Sprite: With Point Light](Assets/Demo Pictures/with green point light.png)

Add directional light to simulate for example the light of the sun which is coming from the same direction in the same intensity independend of your relative position and distance.