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--- 02_user_tutorials:20_light:01_first_steps:04_light-modeling-light-shader [2026/03/20 17:21] – Tim
+++ 02_user_tutorials:20_light:01_first_steps:04_light-modeling-light-shader [2026/03/20 17:22] (current) – Tim
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-===== Local illumination - Shader =====
+====== Local illumination - Shader ======
 To set the optical properties of an object, in computer graphics the so-called local illumination model is used. It defines so-called shaders, that are define the amount of absorption, reflection and transmission and how the light rays are scattered. The values for absorption are obtained as the 'remaining radiation', i.e., the difference between reflectance and transmission, when we subtract the reflectance and transmission from the total of incoming radiation: Absorption = Total - Reflectance - Transmission.