Entity Stack Renderer

Instead of rendering every mob in a dense farm or grinder individually, the mod groups matching mobs that occupy the same space and only renders one visible representative. The rest are hidden visually on your client while the real entities still exist normally in the world.

What it does

Visually stacks mobs of the same type into one rendered mob
Shows a billboard label like x12 above the visible representative
Skips rendering duplicate mobs to reduce client-side rendering load
Supports per-mob enable and disable toggles
Supports optional variant-aware grouping for sheep, cats, horses, and tropical fish
Includes an in-game config screen in the Mods menu
Includes optional debug overlay and debug logging
Rebuilds stack groups on a short throttle for better performance

Performance

Performance gains depend on your hardware, settings, shaders, and how many mobs are on screen.

In one test case, FPS increased from about 35 FPS to 60+ FPS, which is an up to 71% FPS increase.

This is not guaranteed in every situation, but mob farms, breeders, grinders, and other crowded scenes can benefit significantly.

Configuration

You can configure the mod in-game through the Forge Mods menu.

Available options include:

enable or disable the mod
minimum stack size
label scale
max scan distance
grouping cell size
passive and hostile mob toggles
per-mob stacking enable/disable
sheep color grouping
cat, horse, and tropical fish variant grouping
debug overlay
debug logging

Notes

This is a client-side visual optimization mod.
It does not merge server entities or change mob behavior.
Other players and the server still see and handle the real entities normally.