Author: Mohammad Salamatrad

Accurate gamma settings in Corona Renderer are essential for achieving realistic material rendering. This article provides a comprehensive guide on the correct gamma values for various texture maps, including Diffuse, Bump, Normal, Glossiness, Reflection, and IOR. It explains the difference between Gamma 2.2 (sRGB) and Gamma 1.0 (Linear) and details when and how to override gamma settings to ensure physically accurate materials.
Additionally, the article includes a detailed gamma correction table, highlights common mistakes such as incorrect gamma application, and provides step-by-step solutions for fixing rendering issues like washed-out or overly dark textures. Best practices for PBR workflows and compatibility with other rendering engines are also discussed.
By following these guidelines, users can ensure optimal material realism, improving lighting accuracy, reflections, and overall render quality in Corona Renderer.

This comprehensive guide explores the Index of Refraction (IOR) in Corona Renderer, focusing on how it influences the realism of materials by controlling light refraction and reflection. The article explains the definition of IOR, how to calculate it using the Fresnel reflection equation, and the key differences between IOR maps and specular maps.
It provides detailed instructions on applying IOR in both Corona Physical Material and Corona Legacy Material, along with a list of IOR values for common materials like glass, metals, plastics, and natural surfaces. A practical example demonstrates how to create a realistic glass material in Corona Renderer, emphasizing the importance of IOR settings.
The article also highlights common mistakes to avoid when working with IOR, such as incorrect gamma settings and unrealistic values, helping artists achieve photorealistic rendering results.