Firmament

Steadfast is free and open-source software developed by coderbot, and can be downloaded from modrinth.com/shader/steadfast-shaders (Modrinth), curseforge.com/minecraft/shaders/steadfast (CurseForge), or github.com/coderbot16/Steadfast (GitHub). Anyone can modify and distribute it under the terms of the GNU General Public License, version 3.

This is not an official Steadfast release and coderbot does not support it. Bug reports about it do not belong in Steadfast's issue tracker.

Firmament (edit of coderbot's Steadfast)

A shaderpack for Minecraft: Java Edition, built for Iris + Sodium. It is an edit of
coderbot's Steadfast, and takes its name from that.

Four tiers

Pick one at the top of the shader options:

Tier · What it is
Medium (the factory setting) · The pack's own look: the temporal resolve on, SMAA off, everything else as it is
High · Medium plus full-resolution volumetric fog and PBR parallax
Low · Gives up the screen-space shadows and screen-space reflections, and softens the metal diffuse
Toaster · Almost everything off - shadows, volumetric clouds, light shafts, bloom, the temporal resolve, coloured light, the water's and glass's reflections, caustics, PBR materials and their reflections - for a machine that would otherwise not run the pack at all

Each tier sets every option it should, so switching between them is reversible: nothing is
left behind from the tier before.

What this edit adds

• Materials (PBR) - normal, specular, parallax, subsurface and emissive maps from a labPBR

resource pack, with reflections and self-shadowing built on them.

• Colored shadows - sunlight that has come through stained glass lands on the ground in the

colour of the pane, and a nether portal tints the light around it.

• Volumetric light, above and below the waterline - the shafts are drawn under water too,

along the same light axis, brightened where the surface ripples gather them.

• The End's own sky - a giant celestial body with the gravitational lens around it (the

sky behind it bent, the star field stretched into arcs), and the pack's own stars and nebula.

• Water - refraction, screen-space reflection, water parallax, caustics, the sun and moon

reflected in it, and absorption by depth.

• Volumetric clouds, volumetric fog, the Nether's smoke plumes, and the pack's own

rain and snow particles.

• Temporal antialiasing and SMAA, bloom, and a full shader options menu with a material

debug view.

Requirements

• Iris (with Sodium, ideally) - the pack is written for Iris.
• Optional: a labPBR resource pack. Without one the pack works normally and materials

decode to a flat surface. With one, leave Materials (PBR) → Material format on LabPBR;
without one, set it to Off.

Credits

• Steadfast is by coderbot; this pack is an edit of it, distributed under the **GPLv3

and Steadfast's additional terms**.

• It also references or takes code from several other shaders, listed one by one in the pack's

NOTICE.md.

• The screenshots were taken with SPBR by

ShulkerSakura, a vanilla PBR and parallax resource pack built on
Vanilla Normals Renewed by Poudingue
and licensed under the GPLv3. The textures in them are theirs, not part of this pack.