ImmediatelyFast vs VulkanMod
ImmediatelyFast
github.comVulkanMod
github.comSide by side
| Figure | ImmediatelyFast | VulkanMod |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | — |
| Plans published | 1 | 2 |
| Spec score · Minecraft Performance Mods | 8.6 (#1) | 8.0 (#4) |
| Documentation depth | The dedicated API document is only 16 lines and provides dependency coordinates plus the main class. | Hysen Labs characterized the README as an overview and installation sketch, with the wiki serving as the project’s practical documentation. |
| Entity rendering | Entity rendering is one of the optimized areas. | Entity rendering is listed as an optimization target. |
| Known incompatibilities | The README lists OptiFabric/OptiFine and most closed-source clients such as LunarClient and LabyMod as incompatible. | The listed incompatible mods include Sodium, Iris Shaders, Create, and Distant Horizons. |
| License | The project is licensed under LGPL-3.0-or-later. | The repository contains the GNU Lesser General Public License version 3, and Modrinth identifies the project as LGPL-3.0-only. |
| Maker profile | RaphiMC (RK_01) describes himself as a Java reverse engineer, developer, Minecraft mod developer and Minecraft protocol expert. | The xCollateral GitHub profile shows one public repository, 86 followers and no displayed headquarters or legal-company details. |
| Support | The project directs users to report issues through its GitHub issue tracker and links to a Discord server. | Support is routed through the GitHub issue tracker, with requests expected to include launcher details, logs, crash reports, reproduction steps and installed-mod lists. |
| What it does | ImmediatelyFast is an open-source Minecraft client mod that accelerates immediate-mode rendering. | VulkanMod replaces Minecraft Java Edition’s OpenGL renderer with a Vulkan voxel-rendering engine. |
Plans
In their own words
ImmediatelyFast
ImmediatelyFast is a free, open source Minecraft mod that improves client-side rendering performance in Minecraft: Java Edition. It batches draw calls using a custom buffer and sends data to the GPU more efficiently. Its optimizations cover entities, block entities, particles, text, GUI and HUD, maps, and immediate mode rendering used by other mods. The project supports Fabric, Forge, NeoForge, and Quilt, with compatibility listed for Minecraft versions 1.18.2 through 1.21.x and versions 26.1.x, 26.2, and 26.3. It is designed to work with most mods and modpacks, but names OptiFabric, OptiFine, LunarClient, and LabyMod as incompatibilities. The project says it can improve FPS when the CPU is the bottleneck, with slower CPUs benefiting more than very fast ones. A configuration file in the Minecraft instance’s config folder offers performance or compatibility options. The mod is licensed under LGPL-3.0-or-later, and developers can consult API documentation. The project links to a GitHub issue tracker and Discord server for support.
VulkanMod
VulkanMod is a free Minecraft client mod that replaces the default OpenGL renderer with a Vulkan-based engine intended to improve performance. Its listed optimizations cover terrain rendering, chunk building and entities, alongside reduced CPU and GPU overhead. It also supports native Wayland on Linux and windowed fullscreen mode. Installation requires Fabric, followed by placing VulkanMod.jar in the .minecraft/mods folder, and a GPU with at least Vulkan 1.2 support. The project lists Minecraft versions 1.21.3, 1.21.4, 1.21.5, 1.21.10 and 1.21.11. Shader support is not available, and there is no estimated release date; the README points users to Beryl for shaders. Mods that use OpenGL calls are unsupported, including Sodium, Iris Shaders, Create and Distant Horizons. Release 0.6.0 notes a terrain-rendering improvement when backface culling is enabled, an update checker, and fixes for alpha cutout sampling and a memory leak.