Open Prism Launcher → Add Instance → Import from ZIP.
Paste the raw URL to the .mrpack file in this repository (e.g. https://git.reaperofveriod.nl/ReaperOfVeriod/Reaper-s-Sky/raw/branch/main/ReapersSky-1.0.0.mrpack).
Import. Prism downloads all mods, applies configs/shaders/resource pack, and sets the instance up automatically.
(First launch) Allocate 8 GB RAM in Settings → Java → Memory. Requires Java 21.
The multiplayer server reaperofveriod.nl is pre-listed — just hit Multiplayer and join.

What's inside

Core (Create + Aeronautics)

Create 6.0.10 · Create Aeronautics 1.3.1 (bundled) · Sable 2.0.5 · Flywheel (bundled) · kotlinforforge · Curios · geckolib · playeranimator · Placebo · Patchouli

Airships / expansion

aeroworks · aeronautics-covers · aeronautics-dyeable-components · aeronautics-gadgets-and-gizmos · aeronautics-portable-engine-liquid-fuel · aeronautics-propeller-blur · create-simulated-thrusters · create-the-air-war · deployer · simulated-gauges · jade-sable-compat · aero-shadow-fix

Tech

railways · create-new-age · createbigcannons · createdieselgenerators · copycats · create_connected · Design-n-Decor · create_jetpack · cable_facades · ritchiesprojectilelib

Magic

Iron's Spells 'n Spellbooks (irons_spellbooks + irons_lib) · Ars Nouveau

Exploration

Terralith (lithostitched) · YUNG's Better Strongholds / Better Desert Temples / Better Dungeons (YungsApi) · Explorer's Compass · Nature's Compass · Xaero's Minimap · Xaero's World Map · waystones

Survival / QoL

Tough As Nails (GlitchCore) · Farmer's Delight · Apotheosis (Placebo, Apothic Attributes, Apothic Enchanting, Apothic Spawners) · corpse · carry-on · JEI · appleskin · MouseTweaks · Controlling (Searchables) · Jade · WeightedInventory · balm

Performance

Sodium · lithium · ferritecore · ImmediatelyFast · entityculling · dynamic-fps · modernfix · Clumps · spark

Visuals

Iris + EuphoriaPatcher + Complementary Reimagined (Euphoria-patched) shader · iris-flywheel-compat · 3D Skin Layers · Fresh Animations (resource pack, enable in-game)

Key config already applied

Flywheel backend forced to flywheel:indirect — fixes the Create throttle-lever "ghost image" artifact under Iris shaders.
aero-shadow-fix bundled — fixes the white balloon ghost.
Iris is preset to load the included Complementary Reimagined shaderpack.
irisflw replaceCheckerboardTexture = true for correct textures under shaders.

After import

Enable Fresh Animations in Options → Resource Packs (ships alongside 3D Skin Layers).
If shaders look off, verify the Complementary pack is active in Options → Video Settings → Shader Packs.

Rebuilding the pack (maintainers)

python3 build_mrpack.py regenerates the .mrpack from the dedicated "Reaper's Sky - dev" instance at ~/.local/share/PrismLauncher/instances/Reaper's Sky - dev/.minecraft. Set INSTANCE (and OVERRIDES) at the top of the script to point at a different instance.

Known limitations

Create Aeronautics has known visual issues under Iris; the bundled config/mods resolve the most visible ones (balloon + throttle lever). Occasional artifacts on animated Create instances may still appear.
Shader uniform warnings in the log (_flw_cullData, flw_frustumPlanes) from Veil are cosmetic and do not affect rendering on the indirect backend.