mods used are these plus mwse, morrowind code patch (toggle basically everything on), mgexe with a shader to make things brighter, loot to make load order
DLC: Tribunal
DLC: Bloodmoon
Patch for Purists
Morrowind Optimization Patch
Velothi's Veloth's Velothian be Blessed
Vanilla-Friendly Almalexia Replacer
Services Restored
Rarer Scrap Metal
Protective Masks Redux
Outdoor Banners With Sound
Descriptive NPC Classes
Container Ownership
Commonly Used Containers Nerfed
Better Clothes and Roberts Bodies patch
Adamantium Ore Fix
UI Expansion
The Crafting Framework
Skills Module
Weather Adjuster
Morrowind Enhanced Textures 6.1
Correct_Meshes_4.6a
Properly Smoothed Meshes
Better Meshes 111
Overlooked Meshes Replacer
RR - Better Crates and Barrels
RR - Better Meshes
RR - Better Skulls and Bones
Ingredients Mesh Replacer
Beast Overhaul (TR compatible)
Better Dialogue Font
Beauty Font.7z
Creature VFX restoration
FIMs Better Spell Effects 2.1
Vapourmist 4.3.1
Animation Blending
The Midnight Oil
RR - Better Crystals 1.0
MacKom's Humanoid Heads
New Starfields
Robert's Bodies - Pluginless
Watch the Skies 5.0.0
Idle Talk
Its a Deal
Djangos Dialogue
Next Generation Combat
Immersive Movement
Pickpocket Fix by TheOneAndOnly
Stealth
Regional Bounty
No Witness - No Bounty - 1.0.1
Buying Game
Barter Experience
Silver Tongue
HeartStrings
AURA 5.4.1
Races RESPECted
Evened Birthsigns
Attribute Effect Tweaks
quest_skill_reward_fix
Magicka Based Skill Progression
Class-Conscious Character Progression
Religions Elaborated
Morag Tong Polished
Census and Excise Office Faction
Blades Informant
Join the Royal Guards
Main Quest Overhaul
Expansion Delay
Feminist Nerevarine
OAAB_Data
FatigueSpeedAndCarryWeightRebalance
Enchanting Balance Redone
Tribunal Rebalance
Bloodmoon Rebalance
Magicka Expanded

In MGEXEgui.exe: Graphics > Shader Setup > Modding > Editor

Paste: (or download https://www.nexusmods.com/morrowind/mods/45265)

// Apel's gamma correction shader

//tweakables
static float gamma = 0.890;
static float saturation = 1.0;
static float luminance = 2.0;
//tweakables

texture lastshader;
sampler s0 = sampler_state { texture = <lastshader>; minfilter = none; magfilter = none; };

float3 grayscale(float3 col)
{
return dot(col.rgb, float3(0.3, 0.59, 0.11));
}

float4 gammatoo(float2 tex : TEXCOORD) : COLOR0
{
float3 c = tex2D(s0, tex).rgb;
c = lerp(grayscale(c), c, saturation); // Apply saturation
c = pow(c, gamma); // Apply gamma

return float4(saturate(c * luminance ), 1.0);
}

technique T0 < string MGEinterface = "MGE XE 0"; >
{
pass { PixelShader = compile ps_3_0 gammatoo(); }
}
Save and restart MGEXEgui.exe

Back to Graphics > Shader Setup > Modding

You should now have the new shader in your 'available' list. Double click to make it active and save.