FasterShadow Mapping is a really lightweight mod that prevents unneeded things from rendering during the shadow pass.

Compatible shader mods:

Iris (built-in since 1.11.2+)
Beryl
Oculus
Optifine

How it works

During the shadow pass, for opaque models, the color of the model won't have any visual change, a blue car and a red car both cast the same shadow, no matter their color. So what this mod does is it prevents things like the text on signs, the banner patterns, the enchantment glint etc from rendering during the shadow pass. It only improves performances when some of those are visibles.

Performance showcase

Tested with Iris

Small base in a flat world (26.1.2 - 1.0.0)

With / Without | 100FPS / 87FPS (avg) | 63FPS / 58 FPS (0.05% low)

+10% FPS

A lot of signs and banners (26.1.2 - 1.0.0)

With / Without | 15FPS / 9FPS (avg) | 10FPS / 1 FPS (0.05% low)

+50% FPS on average
+1000% FPS on 0.05% low
The signs have text on them but on the other side

Modpacks

Feel free to use this mod in your modpacks without asking for permission.

For developers

If you are the developer of a shader mod, feel free to include this project's code in your mod, or to tell me about it so I can make this mod compatible with your's.

Faster Shadow Mapper