The Sims 4 Reflection Emulation For Blender 2.9 and UP
Making a specular texture in The Sims 4 is probably the most misunderstood process of the game's engine. Making a combined map without a guidance from the company that composed it can be a bit of a nuisance!
For a long time, creators would pick the color from EA's objects and go for that, but there's a method to everything!
This Blender file i created lets you emulate the reflection system of The Sims 4 FULLY and in real time.
How does this work? Basically, the RED channel of the specular map determines the roughness of the reflection, the GREEN channel determines the opacity of said reflection, the BLUE channel determines the roughness of the sun highlight and the ALPHA channel determines the opacity of the sun highlight.
In the blend file, you can either use the RGB color wheel to pick a shade to use on your specular texture project, or test the specular map itself!
I will provide some useful presets you can pick from for common materials as well!