diff --git a/util/materials/colors.hpp b/util/materials/colors.hpp
new file mode 100644
index 0000000..eccace1
--- /dev/null
+++ b/util/materials/colors.hpp
@@ -0,0 +1,83 @@
+#ifndef COLORS
+#define COLORS
+
+#include <cmath>
+#include <algorithm>
+#include <cstdint>
+
+namespace ColorUtils {
+    inline float cieX(float wavelength) {
+        float t1 = (wavelength - 442.0f) * ((wavelength < 442.0f) ? 0.0624f : 0.0374f);
+        float t2 = (wavelength - 599.8f) * ((wavelength < 599.8f) ? 0.0264f : 0.0323f);
+        float t3 = (wavelength - 501.1f) * ((wavelength < 501.1f) ? 0.0490f : 0.0382f);
+        
+        return 0.362f * expf(-0.5f * t1 * t1) + 1.056f * expf(-0.5f * t2 * t2) - 0.065f * expf(-0.5f * t3 * t3);
+    }
+    
+    inline float cieY(float wavelength) {
+        float t1 = (wavelength - 568.8f) * ((wavelength < 568.8f) ? 0.0213f : 0.0247f);
+        float t2 = (wavelength - 530.9f) * ((wavelength < 530.9f) ? 0.0613f : 0.0322f);
+        
+        return 0.821f * expf(-0.5f * t1 * t1) + 0.286f * expf(-0.5f * t2 * t2);
+    }
+    
+    inline float cieZ(float wavelength) {
+        float t1 = (wavelength - 437.0f) * ((wavelength < 437.0f) ? 0.0845f : 0.0278f);
+        float t2 = (wavelength - 459.0f) * ((wavelength < 459.0f) ? 0.0385f : 0.0725f);
+        
+        return 1.217f * expf(-0.5f * t1 * t1) + 0.681f * expf(-0.5f * t2 * t2);
+    }
+
+    inline float gammaCorrect(float c) {
+        return (c <= 0.0031308f) ? (12.92f * c) : (1.055f * powf(c, 1.0f / 2.4f) - 0.055f);
+    }
+
+    inline void wavelengthToRGB(float wavelength, float* rgbOut) {
+        float x = cieX(wavelength);
+        float y = cieY(wavelength);
+        float z = cieZ(wavelength);
+
+        float r = 3.2404542f * x - 1.5371385f * y - 0.4985314f * z;
+        float g = -0.9692660f * x + 1.8760108f * y + 0.0415560f * z;
+        float b = 0.0556434f * x - 0.2040259f * y + 1.0572252f * z;
+
+        rgbOut[0] = gammaCorrect(std::max(0.0f, std::min(1.0f, r)));
+        rgbOut[1] = gammaCorrect(std::max(0.0f, std::min(1.0f, g)));
+        rgbOut[2] = gammaCorrect(std::max(0.0f, std::min(1.0f, b)));
+    }
+
+    inline float rgbToHue(float r, float g, float b) {
+        float maxVal = std::max({r, g, b});
+        float minVal = std::min({r, g, b});
+        float delta = maxVal - minVal;
+
+        if (delta < 0.00001f) return 0.0f;
+
+        float hue = 0.0f;
+        if (maxVal == r) {
+            hue = (g - b) / delta + (g < b ? 6.0f : 0.0f);
+        } else if (maxVal == g) {
+            hue = (b - r) / delta + 2.0f;
+        } else {
+            hue = (r - g) / delta + 4.0f;
+        }
+        return hue * 60.0f;
+    }
+
+    inline float hueToWavelength(float hue) {
+        float wl = 0.0f;
+        if (hue >= 260.0f) {
+            wl = 380.0f + (hue - 260.0f) * 0.5f; 
+        } else if (hue < 120.0f) {
+                wl = 650.0f - (hue / 120.0f) * (650.0f - 510.0f);
+        } else if (hue < 240.0f) {
+            wl = 510.0f - ((hue - 120.0f) / 120.0f) * (510.0f - 440.0f);
+        } else {
+            wl = 440.0f - ((hue - 240.0f) / 120.0f) * (440.0f - 380.0f);
+        }
+        return wl;
+    }
+}
+
+
+#endif
\ No newline at end of file
diff --git a/util/materials/materials.hpp b/util/materials/materials.hpp
new file mode 100644
index 0000000..b9ec4f9
--- /dev/null
+++ b/util/materials/materials.hpp
@@ -0,0 +1,160 @@
+#ifndef G3_MATERIALS_HPP
+#define G3_MATERIALS_HPP
+
+#include "colors.hpp"
+
+struct Material {
+    float ior;
+    float dispersion;
+    float chromaticity;
+    float bandwidth;
+    float transmission;
+    float roughness;
+    float emittance;
+    bool light;
+    float density;
+    float speedOfSound;
+    float audioAbsorption;
+
+    // Constructor with sensible defaults
+    Material(float ior = 1.5f, float dispersion = 0.0f, float chromaticity = 550.0f, 
+             float bandwidth = 100.0f, float transmission = 0.0f, float roughness = 0.8f, 
+             float emittance = 0.0f, float density = 1000.0f, float speedOfSound = 343.0f,
+             float audioAbsorption = 0.1f, bool light = false)
+        : ior(ior), dispersion(dispersion), chromaticity(chromaticity), bandwidth(bandwidth),
+         transmission(transmission), roughness(roughness), emittance(emittance), 
+         density(density), speedOfSound(speedOfSound), audioAbsorption(audioAbsorption), light(light) {}
+
+          
+    static Material fromRGB(float r, float g, float b, float ior = 1.5f, float transmission = 0.0f, 
+                           float roughness = 0.8f, float emittance = 0.0f, bool isLight = false) {
+        float hue = ColorUtils::rgbToHue(r, g, b);
+        float wavelength = ColorUtils::hueToWavelength(hue);
+
+        float maxVal = std::max({r, g, b});
+        float minVal = std::min({r, g, b});
+        float delta = maxVal - minVal;
+        
+        float saturation = (maxVal > 0.0f) ? (delta / maxVal) : 0.0f;
+        
+        float bandwidth = 10.0f + (1.0f - saturation) * 290.0f;
+
+        return Material(ior, 0.02f, wavelength, bandwidth, transmission, roughness, emittance, 2.0f, 3000.0f, 0.1f, isLight);
+    }
+};
+
+namespace Materials {
+    // Metals
+    static const Material Gold(0.47f, 0.25f, 580.0f, 150.0f, 0.95f, 0.2f, 0.0f, 19300.0f, 3240.0f, 0.01f, false);
+    static const Material Silver(0.18f, 0.35f, 450.0f, 200.0f, 0.98f, 0.15f, 0.0f, 10500.0f, 3650.0f, 0.008f, false);
+    static const Material Copper(0.64f, 0.22f, 620.0f, 100.0f, 0.90f, 0.3f, 0.0f, 8960.0f, 4760.0f, 0.012f, false);
+    static const Material Iron(2.91f, 0.15f, 500.0f, 180.0f, 0.65f, 0.4f, 0.0f, 7870.0f, 5130.0f, 0.015f, false);
+    static const Material Aluminum(1.44f, 0.20f, 500.0f, 200.0f, 0.92f, 0.25f, 0.0f, 2700.0f, 6320.0f, 0.009f, false);
+    static const Material Platinum(2.06f, 0.18f, 500.0f, 180.0f, 0.90f, 0.2f, 0.0f, 21450.0f, 3960.0f, 0.01f, false);
+    static const Material Bronze(1.15f, 0.12f, 590.0f, 120.0f, 0.85f, 0.35f, 0.0f, 8700.0f, 3580.0f, 0.02f, false);
+    static const Material Brass(0.85f, 0.15f, 570.0f, 130.0f, 0.88f, 0.3f, 0.0f, 8520.0f, 4700.0f, 0.018f, false);
+
+    // Glass
+    static const Material Glass(1.52f, 0.008f, 550.0f, 80.0f, 0.92f, 0.05f, 0.0f, 2500.0f, 5300.0f, 0.05f, false);
+    static const Material FlintGlass(1.62f, 0.028f, 550.0f, 100.0f, 0.90f, 0.05f, 0.0f, 3600.0f, 5100.0f, 0.06f, false);
+    static const Material Borosilicate(1.47f, 0.005f, 550.0f, 70.0f, 0.95f, 0.04f, 0.0f, 2230.0f, 5600.0f, 0.04f, false);
+    static const Material FusedSilica(1.46f, 0.004f, 550.0f, 60.0f, 0.98f, 0.02f, 0.0f, 2200.0f, 5968.0f, 0.03f, false);
+    static const Material LeadCrystal(1.57f, 0.025f, 550.0f, 90.0f, 0.93f, 0.03f, 0.0f, 3800.0f, 4200.0f, 0.07f, false);
+    static const Material Obsidian(1.48f, 0.010f, 500.0f, 150.0f, 0.30f, 0.4f, 0.0f, 2600.0f, 4800.0f, 0.15f, false);
+    static const Material StainedGlassRed(1.52f, 0.008f, 650.0f, 50.0f, 0.60f, 0.08f, 0.0f, 2550.0f, 5200.0f, 0.08f, false);
+    static const Material StainedGlassBlue(1.52f, 0.008f, 470.0f, 50.0f, 0.65f, 0.08f, 0.0f, 2550.0f, 5200.0f, 0.08f, false);
+    static const Material StainedGlassGreen(1.52f, 0.008f, 530.0f, 50.0f, 0.60f, 0.08f, 0.0f, 2550.0f, 5200.0f, 0.08f, false);
+    static const Material StainedGlassYellow(1.52f, 0.008f, 580.0f, 50.0f, 0.70f, 0.08f, 0.0f, 2550.0f, 5200.0f, 0.08f, false);
+    static const Material FrostedGlass(1.52f, 0.008f, 550.0f, 80.0f, 0.85f, 0.7f, 0.0f, 2500.0f, 5300.0f, 0.25f, false);
+    static const Material TemperedGlass(1.52f, 0.008f, 550.0f, 80.0f, 0.91f, 0.06f, 0.0f, 2500.0f, 5400.0f, 0.06f, false);
+
+    // Water
+    static const Material FreshWater(1.333f, 0.018f, 475.0f, 200.0f, 0.99f, 0.1f, 0.0f, 1000.0f, 1480.0f, 0.002f, false);
+    static const Material SaltWater(1.339f, 0.020f, 475.0f, 250.0f, 0.85f, 0.15f, 0.0f, 1025.0f, 1530.0f, 0.003f, false);
+    static const Material BrackishWater(1.336f, 0.019f, 480.0f, 220.0f, 0.70f, 0.2f, 0.0f, 1010.0f, 1500.0f, 0.005f, false);
+    static const Material DistilledWater(1.333f, 0.017f, 475.0f, 180.0f, 0.995f, 0.05f, 0.0f, 1000.0f, 1480.0f, 0.001f, false);
+    static const Material MurkyWater(1.340f, 0.022f, 550.0f, 300.0f, 0.30f, 0.4f, 0.0f, 1030.0f, 1450.0f, 0.05f, false);
+
+    // Gems
+    static const Material Diamond(2.42f, 0.044f, 550.0f, 50.0f, 0.99f, 0.01f, 0.0f, 3520.0f, 12000.0f, 0.005f, false);
+    static const Material Emerald(1.58f, 0.014f, 530.0f, 40.0f, 0.85f, 0.1f, 0.0f, 2750.0f, 8500.0f, 0.02f, false);
+    static const Material Ruby(1.77f, 0.018f, 690.0f, 30.0f, 0.80f, 0.15f, 0.0f, 4000.0f, 8800.0f, 0.015f, false);
+    static const Material Sapphire(1.77f, 0.018f, 460.0f, 40.0f, 0.85f, 0.12f, 0.0f, 3980.0f, 8700.0f, 0.015f, false);
+    static const Material Amethyst(1.54f, 0.013f, 420.0f, 60.0f, 0.75f, 0.2f, 0.0f, 2650.0f, 7200.0f, 0.025f, false);
+    static const Material Topaz(1.63f, 0.014f, 590.0f, 50.0f, 0.88f, 0.15f, 0.0f, 3560.0f, 8000.0f, 0.018f, false);
+    static const Material Opal(1.45f, 0.010f, 550.0f, 200.0f, 0.70f, 0.3f, 0.0f, 2100.0f, 4500.0f, 0.03f, false);
+
+    // Natural Materials
+    static const Material PlantLeaf(1.45f, 0.05f, 550.0f, 100.0f, 0.15f, 0.7f, 0.0f, 800.0f, 350.0f, 0.4f, false);
+    static const Material Wood(1.50f, 0.10f, 650.0f, 150.0f, 0.10f, 0.9f, 0.0f, 700.0f, 3300.0f, 0.35f, false);
+    static const Material Soil(1.55f, 0.08f, 600.0f, 200.0f, 0.05f, 0.95f, 0.0f, 1600.0f, 300.0f, 0.6f, false);
+    static const Material Snow(1.31f, 0.015f, 450.0f, 100.0f, 0.98f, 0.6f, 0.0f, 250.0f, 320.0f, 0.5f, false);
+    static const Material Ice(1.31f, 0.016f, 475.0f, 120.0f, 0.90f, 0.3f, 0.0f, 917.0f, 3980.0f, 0.08f, false);
+    static const Material Sand(1.54f, 0.06f, 580.0f, 180.0f, 0.20f, 0.85f, 0.0f, 1600.0f, 200.0f, 0.7f, false);
+    static const Material Rock(1.55f, 0.07f, 550.0f, 200.0f, 0.08f, 0.8f, 0.0f, 2750.0f, 5500.0f, 0.2f, false);
+    static const Material Marble(1.50f, 0.005f, 550.0f, 150.0f, 0.40f, 0.4f, 0.0f, 2710.0f, 6100.0f, 0.15f, false);
+
+    // Stars and Lights
+    static const Material Sun(1.0f, 0.0f, 580.0f, 300.0f, 1.0f, 0.0f, 1.0f, 1408.0f, 0.0f, 0.0f, true);
+    static const Material RedStar(1.0f, 0.0f, 700.0f, 200.0f, 1.0f, 0.0f, 0.8f, 0.1f, 0.0f, 0.0f, true);
+    static const Material YellowStar(1.0f, 0.0f, 580.0f, 250.0f, 1.0f, 0.0f, 0.9f, 0.2f, 0.0f, 0.0f, true);
+    static const Material BlueStar(1.0f, 0.0f, 450.0f, 150.0f, 1.0f, 0.0f, 1.2f, 0.3f, 0.0f, 0.0f, true);
+    static const Material BrownStar(1.0f, 0.0f, 1000.0f, 400.0f, 1.0f, 0.0f, 0.3f, 0.05f, 0.0f, 0.0f, true);
+    static const Material WhiteStar(1.0f, 0.0f, 550.0f, 200.0f, 1.0f, 0.0f, 1.1f, 0.4f, 0.0f, 0.0f, true);
+    static const Material Moon(1.0f, 0.0f, 580.0f, 150.0f, 1.0f, 0.0f, 0.015f, 3340.0f, 0.0f, 0.0f, true);
+    static const Material LEDWhite(1.0f, 0.0f, 550.0f, 100.0f, 1.0f, 0.0f, 0.7f, 2000.0f, 0.0f, 0.0f, true);
+    static const Material LEDWarm(1.0f, 0.0f, 600.0f, 80.0f, 1.0f, 0.0f, 0.6f, 2000.0f, 0.0f, 0.0f, true);
+    static const Material NeonRed(1.0f, 0.0f, 640.0f, 10.0f, 1.0f, 0.0f, 0.5f, 0.9f, 0.0f, 0.0f, true);
+    static const Material NeonBlue(1.0f, 0.0f, 480.0f, 15.0f, 1.0f, 0.0f, 0.5f, 0.9f, 0.0f, 0.0f, true);
+
+    // Flames
+    static const Material CandleFlame(1.0002f, 0.002f, 650.0f, 100.0f, 0.7f, 0.9f, 0.8f, 0.2f, 343.0f, 0.8f, true);
+    static const Material WoodFire(1.0003f, 0.003f, 620.0f, 150.0f, 0.6f, 0.95f, 1.2f, 0.3f, 350.0f, 0.7f, true);
+    static const Material GasFlame(1.0002f, 0.001f, 580.0f, 80.0f, 0.8f, 0.8f, 1.0f, 0.25f, 345.0f, 0.75f, true);
+    static const Material PropaneFlame(1.0002f, 0.0015f, 590.0f, 120.0f, 0.75f, 0.85f, 1.1f, 0.28f, 348.0f, 0.72f, true);
+    static const Material AlcoholFlame(1.0002f, 0.002f, 610.0f, 90.0f, 0.85f, 0.7f, 0.9f, 0.22f, 340.0f, 0.78f, true);
+    static const Material Plasma(1.0001f, 0.005f, 450.0f, 200.0f, 0.9f, 0.5f, 2.0f, 0.001f, 1000.0f, 0.3f, true);
+    
+    // Organic materials
+    static const Material Skin(1.38f, 0.03f, 580.0f, 120.0f, 0.25f, 0.6f, 0.0f, 1100.0f, 1540.0f, 0.25f, false);
+    static const Material Hair(1.55f, 0.04f, 600.0f, 100.0f, 0.10f, 0.8f, 0.0f, 1300.0f, 100.0f, 0.6f, false);
+    static const Material Cotton(1.52f, 0.06f, 580.0f, 150.0f, 0.30f, 0.9f, 0.0f, 1520.0f, 200.0f, 0.55f, false);
+    static const Material Silk(1.54f, 0.05f, 570.0f, 130.0f, 0.40f, 0.7f, 0.0f, 1320.0f, 150.0f, 0.45f, false);
+    static const Material Leather(1.50f, 0.08f, 630.0f, 140.0f, 0.15f, 0.85f, 0.0f, 860.0f, 400.0f, 0.5f, false);
+    
+    // Plastics and Polymers
+    static const Material Acrylic(1.49f, 0.008f, 550.0f, 90.0f, 0.92f, 0.1f, 0.0f, 1180.0f, 2670.0f, 0.12f, false);
+    static const Material Polycarbonate(1.58f, 0.010f, 550.0f, 95.0f, 0.88f, 0.15f, 0.0f, 1200.0f, 2270.0f, 0.15f, false);
+    static const Material PVC(1.54f, 0.012f, 550.0f, 120.0f, 0.70f, 0.3f, 0.0f, 1380.0f, 2380.0f, 0.18f, false);
+    static const Material Rubber(1.52f, 0.020f, 600.0f, 200.0f, 0.10f, 0.9f, 0.0f, 1100.0f, 1500.0f, 0.4f, false);
+    
+    // Atmosphere Layers
+    static const Material Troposphere(1.00029f, 0.00015f, 475.0f, 350.0f, 0.95f, 0.3f, 0.0f, 1.225f, 343.0f, 0.01f, false);
+    static const Material Tropopause(1.00027f, 0.00012f, 470.0f, 320.0f, 0.97f, 0.2f, 0.0f, 0.66f, 295.0f, 0.008f, false);
+    static const Material Stratosphere(1.00025f, 0.00010f, 450.0f, 300.0f, 0.92f, 0.1f, 0.0f, 0.12f, 300.0f, 0.006f, false);
+    static const Material OzoneLayer(1.00026f, 0.00011f, 300.0f, 200.0f, 0.85f, 0.05f, 0.0f, 0.08f, 310.0f, 0.01f, false);
+    static const Material Stratopause(1.00022f, 0.00009f, 460.0f, 280.0f, 0.96f, 0.08f, 0.0f, 0.04f, 315.0f, 0.005f, false);
+    static const Material Mesosphere(1.00018f, 0.00008f, 490.0f, 250.0f, 0.88f, 0.15f, 0.0f, 0.008f, 280.0f, 0.004f, false);
+    static const Material Mesopause(1.00015f, 0.00007f, 500.0f, 230.0f, 0.94f, 0.12f, 0.0f, 0.005f, 275.0f, 0.003f, false);
+    static const Material Thermosphere(1.00010f, 0.00006f, 520.0f, 200.0f, 0.82f, 0.05f, 0.02f, 0.0002f, 500.0f, 0.001f, false);
+    static const Material Ionosphere(1.00008f, 0.00020f, 430.0f, 400.0f, 0.75f, 0.08f, 0.05f, 0.0001f, 1000.0f, 0.002f, false);
+    static const Material Exosphere(1.00001f, 0.00005f, 550.0f, 150.0f, 0.90f, 0.02f, 0.0f, 0.000001f, 0.0f, 0.0f, false);
+    static const Material KarmanLine(1.000005f, 0.00004f, 560.0f, 120.0f, 0.98f, 0.01f, 0.0f, 0.0000005f, 0.0f, 0.0f, false);
+    
+    // Atmospheric Conditions
+    static const Material ClearSky(1.00028f, 0.00013f, 475.0f, 320.0f, 0.97f, 0.1f, 0.0f, 1.2f, 343.0f, 0.02f, false);
+    static const Material HazySky(1.00030f, 0.00018f, 550.0f, 400.0f, 0.85f, 0.5f, 0.0f, 1.3f, 343.0f, 0.1f, false);
+    static const Material FoggyAir(1.00032f, 0.00025f, 580.0f, 500.0f, 0.60f, 0.9f, 0.0f, 1.4f, 343.0f, 0.3f, false);
+    static const Material RainyAir(1.00031f, 0.00022f, 500.0f, 450.0f, 0.70f, 0.7f, 0.0f, 1.35f, 343.0f, 0.15f, false);
+    static const Material MartianAtmosphere(1.00015f, 0.00030f, 650.0f, 200.0f, 0.80f, 0.6f, 0.0f, 0.02f, 240.0f, 0.08f, false);
+    static const Material VenusianAtmosphere(1.00050f, 0.00040f, 580.0f, 600.0f, 0.30f, 0.8f, 0.1f, 67.0f, 400.0f, 0.4f, false);
+    static const Material TitanAtmosphere(1.00040f, 0.00035f, 620.0f, 400.0f, 0.40f, 0.7f, 0.0f, 5.3f, 200.0f, 0.25f, false);
+    static const Material AuroraBorealis(1.00012f, 0.00050f, 557.7f, 50.0f, 0.90f, 0.3f, 0.3f, 0.001f, 0.0f, 0.0f, true);
+    static const Material AuroraRed(1.00012f, 0.00050f, 630.0f, 40.0f, 0.90f, 0.3f, 0.2f, 0.001f, 0.0f, 0.0f, true);
+    static const Material AuroraBlue(1.00012f, 0.00050f, 428.0f, 60.0f, 0.90f, 0.3f, 0.25f, 0.001f, 0.0f, 0.0f, true);
+    static const Material SeaLevelAir(1.00029f, 0.00015f, 550.0f, 300.0f, 0.95f, 0.1f, 0.0f, 1.225f, 343.0f, 0.01f, false);
+    static const Material MountainAir(1.00025f, 0.00012f, 500.0f, 280.0f, 0.97f, 0.05f, 0.0f, 0.96f, 330.0f, 0.008f, false);
+    static const Material HighAltitudeAir(1.00020f, 0.00010f, 480.0f, 250.0f, 0.98f, 0.03f, 0.0f, 0.74f, 320.0f, 0.006f, false);
+}
+
+#endif
\ No newline at end of file
diff --git a/util/sim/fluidsim.hpp b/util/sim/fluidsim.hpp
index e0c11f5..c431107 100644
--- a/util/sim/fluidsim.hpp
+++ b/util/sim/fluidsim.hpp
@@ -176,7 +176,7 @@ public:
 
     fluidSim() : grid({-config.gridSizeCube, -config.gridSizeCube, -config.gridSizeCube}, {config.gridSizeCube, config.gridSizeCube, config.gridSizeCube}) {
         closeThresh = 0.01f * config.SMOOTHING_RADIUS;
-        grid.setBackgroundColor({0.1f, 0.1f, 0.2f});
+        //grid.setBackgroundColor({0.1f, 0.1f, 0.2f});
         gradientmap.emplace(0.0, Eigen::Vector3f(1, 0, 0));
         gradientmap.emplace(0.5, Eigen::Vector3f(0, 1, 0));
         gradientmap.emplace(1.0, Eigen::Vector3f(0, 0, 1));