diff --git a/src/index.d.ts b/src/index.d.ts
index 1c65256..5474d8a 100644
--- a/src/index.d.ts
+++ b/src/index.d.ts
@@ -25,6 +25,7 @@ export interface COBEOptions {
   opacity?: number;
   offset?: [number, number];
   scale?: number;
+  ambient?: number;
   context?: WebGLContextAttributes;
 }
 
diff --git a/src/index.js b/src/index.js
index 298f3a5..5167a84 100644
--- a/src/index.js
+++ b/src/index.js
@@ -15,6 +15,7 @@ const OPT_OFFSET = "offset";
 const OPT_SCALE = "scale";
 const OPT_OPACITY = "opacity";
 const OPT_MAP_BASE_BRIGHTNESS = "mapBaseBrightness";
+const OPT_AMBIENT = "ambient";
 
 const OPT_MAPPING = {
     [OPT_PHI]: GLSLX_NAME_PHI,
@@ -30,6 +31,7 @@ const OPT_MAPPING = {
     [OPT_SCALE]: GLSLX_NAME_SCALE,
     [OPT_OPACITY]: GLSLX_NAME_OPACITY,
     [OPT_MAP_BASE_BRIGHTNESS]: GLSLX_NAME_MAP_BASE_BRIGHTNESS,
+    [OPT_AMBIENT]: GLSLX_NAME_AMBIENT,
 };
 
 const { PI, sin, cos, sqrt, atan2, floor, max, pow, log2 } = Math;
@@ -192,6 +194,7 @@ export default (canvas, opts) => {
             [GLSLX_NAME_OFFSET]: createUniform("vec2", OPT_OFFSET, [0, 0]),
             [GLSLX_NAME_SCALE]: createUniform("float", OPT_SCALE, 1),
             [GLSLX_NAME_OPACITY]: createUniform("float", OPT_OPACITY, 1),
+            [GLSLX_NAME_AMBIENT]: createUniform("float", OPT_AMBIENT, 0.1),
         },
         mode: 4,
         geometry: {
diff --git a/src/shader.frag b/src/shader.frag
index edc08ec..6b2030f 100644
--- a/src/shader.frag
+++ b/src/shader.frag
@@ -16,8 +16,9 @@ uniform float markersNum;
 uniform float dotsBrightness;
 uniform float diffuse;
 uniform float dark;
-uniform float opacity; 
+uniform float opacity;
 uniform float mapBaseBrightness;
+uniform float ambient;
 
 uniform sampler2D uTexture;
 
@@ -164,7 +165,7 @@ void main() {
 
     float lighting = pow(dotNL,diffuse)*dotsBrightness;
     float sample = mapColor*v * lighting;
-    float colorFactor = mix((1. - sample) * pow(dotNL,.4), sample, dark) + .1;
+    float colorFactor = mix((1. - sample) * pow(dotNL,.4), sample, dark) + ambient;
     layer += vec4(baseColor * colorFactor, 1.);
 
     float markerLight = 0.;
diff --git a/src/shader.min.js b/src/shader.min.js
index 32b9b8b..3a21dad 100644
--- a/src/shader.min.js
+++ b/src/shader.min.js
@@ -1,4 +1,4 @@
-export const GLSLX_SOURCE_MAIN = "precision highp float;uniform vec2 w,x;uniform vec3 S,T,y;uniform vec4 u[64*2];uniform float z,A,k,B,C,D,E,F,U,G;uniform sampler2D H;float I=1./k;mat3 J(float a,float b){float c=cos(a),d=cos(b),e=sin(a),f=sin(b);return mat3(d,f*e,-f*c,0.,c,e,f,d*-e,d*c);}vec3 K(vec3 c,out float v){c=c.xzy;float p=max(2.,floor(log2(2.236068*k*3.141593*(1.-c.z*c.z))*.72021));vec2 g=floor(pow(1.618034,p)/2.236068*vec2(1,1.618034)+.5),d=fract((g+1.)*.618034)*6.283185-3.883222,e=-2.*g,f=vec2(atan(c.y,c.x),c.z-1.),q=floor(vec2(e.y*f.x-d.y*(f.y*k+1.),-e.x*f.x+d.x*(f.y*k+1.))/(d.x*e.y-e.x*d.y));float n=3.141593;vec3 r;for(float h=0.;h<4.;h+=1.){vec2 s=vec2(mod(h,2.),floor(h*.5));float j=dot(g,q+s);if(j>k)continue;float a=j,b=0.;if(a>=524288.)a-=524288.,b+=.803894;if(a>=262144.)a-=262144.,b+=.901947;if(a>=131072.)a-=131072.,b+=.950973;if(a>=65536.)a-=65536.,b+=.475487;if(a>=32768.)a-=32768.,b+=.737743;if(a>=16384.)a-=16384.,b+=.868872;if(a>=8192.)a-=8192.,b+=.934436;if(a>=4096.)a-=4096.,b+=.467218;if(a>=2048.)a-=2048.,b+=.733609;if(a>=1024.)a-=1024.,b+=.866804;if(a>=512.)a-=512.,b+=.433402;if(a>=256.)a-=256.,b+=.216701;if(a>=128.)a-=128.,b+=.108351;if(a>=64.)a-=64.,b+=.554175;if(a>=32.)a-=32.,b+=.777088;if(a>=16.)a-=16.,b+=.888544;if(a>=8.)a-=8.,b+=.944272;if(a>=4.)a-=4.,b+=.472136;if(a>=2.)a-=2.,b+=.236068;if(a>=1.)a-=1.,b+=.618034;float l=fract(b)*6.283185,i=1.-2.*j*I,m=sqrt(1.-i*i);vec3 o=vec3(cos(l)*m,sin(l)*m,i);float t=length(c-o);if(t<n)n=t,r=o;}v=n;return r.xzy;}void main(){vec2 f=1./w,a=(gl_FragCoord.xy*f*2.-1.)/B-x*vec2(1,-1)*f;a.x*=w.x*f.y;float c=dot(a,a);vec4 t=vec4(0);float j=0.;int V=int(C);if(c<=.64){float b;vec4 e=vec4(0);vec3 v=vec3(0,0,1),l=normalize(vec3(a,sqrt(.64-c)));mat3 L=J(A,z);float g=dot(l,v);vec3 m=l*L,h=K(m,b);float n=asin(h.y),i=acos(-h.x/cos(n));i=h.z<0.?-i:i;float M=max(texture2D(H,vec2(i*.5/3.141593,-(n/3.141593+.5))).x,G),N=smoothstep(8e-3,0.,b),o=pow(g,E)*D,p=M*N*o,W=mix((1.-p)*pow(g,.4),p,F)+.1;e+=vec4(S*W,1.);float X=0.;for(int d=0;d<128;d+=2){if(d>=V)break;vec4 q=u[d],O=u[d+1];vec3 P=q.xyz;float r=q.w;vec3 Y=P-m;b=length(Y);if(b<r){float Q=r*.5,s=smoothstep(Q,0.,b);X+=s,e.xyz=O.w>.5?mix(e.xyz,O.xyz,s*o):mix(e.xyz,T,s*o);}}e.xyz+=pow(1.-g,4.)*y,t+=e*(1.+U)*.5,j=pow(dot(normalize(vec3(-a,sqrt(1.-c))),vec3(0,0,1)),4.)*smoothstep(0.,1.,.2/(c-.64));}else{float R=sqrt(.2/(c-.64));j=smoothstep(.5,1.,R/(R+1.));}gl_FragColor=t+vec4(j*y,j);}"
+export const GLSLX_SOURCE_MAIN = "precision highp float;uniform vec2 w,x;uniform vec3 T,U,y;uniform vec4 u[64*2];uniform float z,A,k,B,C,D,E,F,V,G,H;uniform sampler2D I;float J=1./k;mat3 K(float a,float b){float c=cos(a),d=cos(b),e=sin(a),f=sin(b);return mat3(d,f*e,-f*c,0.,c,e,f,d*-e,d*c);}vec3 L(vec3 c,out float v){c=c.xzy;float p=max(2.,floor(log2(2.236068*k*3.141593*(1.-c.z*c.z))*.72021));vec2 g=floor(pow(1.618034,p)/2.236068*vec2(1,1.618034)+.5),d=fract((g+1.)*.618034)*6.283185-3.883222,e=-2.*g,f=vec2(atan(c.y,c.x),c.z-1.),q=floor(vec2(e.y*f.x-d.y*(f.y*k+1.),-e.x*f.x+d.x*(f.y*k+1.))/(d.x*e.y-e.x*d.y));float n=3.141593;vec3 r;for(float h=0.;h<4.;h+=1.){vec2 s=vec2(mod(h,2.),floor(h*.5));float j=dot(g,q+s);if(j>k)continue;float a=j,b=0.;if(a>=524288.)a-=524288.,b+=.803894;if(a>=262144.)a-=262144.,b+=.901947;if(a>=131072.)a-=131072.,b+=.950973;if(a>=65536.)a-=65536.,b+=.475487;if(a>=32768.)a-=32768.,b+=.737743;if(a>=16384.)a-=16384.,b+=.868872;if(a>=8192.)a-=8192.,b+=.934436;if(a>=4096.)a-=4096.,b+=.467218;if(a>=2048.)a-=2048.,b+=.733609;if(a>=1024.)a-=1024.,b+=.866804;if(a>=512.)a-=512.,b+=.433402;if(a>=256.)a-=256.,b+=.216701;if(a>=128.)a-=128.,b+=.108351;if(a>=64.)a-=64.,b+=.554175;if(a>=32.)a-=32.,b+=.777088;if(a>=16.)a-=16.,b+=.888544;if(a>=8.)a-=8.,b+=.944272;if(a>=4.)a-=4.,b+=.472136;if(a>=2.)a-=2.,b+=.236068;if(a>=1.)a-=1.,b+=.618034;float l=fract(b)*6.283185,i=1.-2.*j*J,m=sqrt(1.-i*i);vec3 o=vec3(cos(l)*m,sin(l)*m,i);float t=length(c-o);if(t<n)n=t,r=o;}v=n;return r.xzy;}void main(){vec2 f=1./w,a=(gl_FragCoord.xy*f*2.-1.)/B-x*vec2(1,-1)*f;a.x*=w.x*f.y;float c=dot(a,a);vec4 t=vec4(0);float j=0.;int W=int(C);if(c<=.64){float b;vec4 e=vec4(0);vec3 v=vec3(0,0,1),l=normalize(vec3(a,sqrt(.64-c)));mat3 M=K(A,z);float g=dot(l,v);vec3 m=l*M,h=L(m,b);float n=asin(h.y),i=acos(-h.x/cos(n));i=h.z<0.?-i:i;float N=max(texture2D(I,vec2(i*.5/3.141593,-(n/3.141593+.5))).x,G),O=smoothstep(8e-3,0.,b),o=pow(g,E)*D,p=N*O*o,X=mix((1.-p)*pow(g,.4),p,F)+H;e+=vec4(T*X,1.);float Y=0.;for(int d=0;d<128;d+=2){if(d>=W)break;vec4 q=u[d],P=u[d+1];vec3 Q=q.xyz;float r=q.w;vec3 Z=Q-m;b=length(Z);if(b<r){float R=r*.5,s=smoothstep(R,0.,b);Y+=s,e.xyz=P.w>.5?mix(e.xyz,P.xyz,s*o):mix(e.xyz,U,s*o);}}e.xyz+=pow(1.-g,4.)*y,t+=e*(1.+V)*.5,j=pow(dot(normalize(vec3(-a,sqrt(1.-c))),vec3(0,0,1)),4.)*smoothstep(0.,1.,.2/(c-.64));}else{float S=sqrt(.2/(c-.64));j=smoothstep(.5,1.,S/(S+1.));}gl_FragColor=t+vec4(j*y,j);}"
 
 export const GLSLX_NAME_DOTS = "k"
 export const GLSLX_NAME_MARKERS = "u"
@@ -13,7 +13,8 @@ export const GLSLX_NAME_DOTS_BRIGHTNESS = "D"
 export const GLSLX_NAME_DIFFUSE = "E"
 export const GLSLX_NAME_DARK = "F"
 export const GLSLX_NAME_MAP_BASE_BRIGHTNESS = "G"
-export const GLSLX_NAME_U_TEXTURE = "H"
-export const GLSLX_NAME_BASE_COLOR = "S"
-export const GLSLX_NAME_MARKER_COLOR = "T"
-export const GLSLX_NAME_OPACITY = "U"
+export const GLSLX_NAME_AMBIENT = "H"
+export const GLSLX_NAME_U_TEXTURE = "I"
+export const GLSLX_NAME_BASE_COLOR = "T"
+export const GLSLX_NAME_MARKER_COLOR = "U"
+export const GLSLX_NAME_OPACITY = "V"
diff --git a/website/pages/docs/api.mdx b/website/pages/docs/api.mdx
index 5f558c2..4417c32 100644
--- a/website/pages/docs/api.mdx
+++ b/website/pages/docs/api.mdx
@@ -25,6 +25,7 @@ An object with the following properties:
 | theta | The [θ angle](https://en.wikipedia.org/wiki/Spherical_coordinate_system), -π ≤ theta ≤ π | Required |
 | dark | Display the globe in dark or light mode, 0 ≤ dark ≤ 1 | Required |
 | diffuse | Control the [diffuse lighting](https://en.wikipedia.org/wiki/Computer_graphics_lighting#:~:text=of%20lighting%20interactions.-,Diffuse,the%20angle%20of%20incoming%20light.), 0 ≤ diffuse | Required |
+| ambient | The ambient light intensity, 0 ≤ ambient ≤ 1 | |
 | mapSamples | Number of dots displayed, 0 ≤ mapSamples ≤ 100000 | Required |
 | mapBrightness | Brightness of the dots, 0 ≤ mapBrightness | Required |
 | mapBaseBrightness | Brightness of samples that are not on the map, 0 ≤ mapBaseBrightness | |
diff --git a/website/pages/docs/index.mdx b/website/pages/docs/index.mdx
index f9d4068..ee6f3fd 100644
--- a/website/pages/docs/index.mdx
+++ b/website/pages/docs/index.mdx
@@ -1,6 +1,6 @@
 # Get Started
 
-COBE does’t rely on any external libraries or UI framework. It is a vanilla JavaScript library that can be used in any web applications. 
+COBE does’t rely on any external libraries or UI framework. It is a vanilla JavaScript library that can be used in any web applications.
 
 The easiest way to use this library is to create a canvas element and use a CDN to import the library:
 
@@ -26,6 +26,7 @@ The easiest way to use this library is to create a canvas element and use a CDN
     theta: 0,
     dark: 0,
     diffuse: 1.2,
+    ambient: 0.1,
     scale: 1,
     mapSamples: 16000,
     mapBrightness: 6,
@@ -85,7 +86,7 @@ Example: [https://codesandbox.io/s/eager-sky-r2q0g](https://codesandbox.io/s/eag
 
 Example: [https://stackblitz.com/edit/vitejs-vite-l5a8xk](https://stackblitz.com/edit/vitejs-vite-l5a8xk?file=src%2FApp.vue).
 
-### Svelte 
+### Svelte
 
 Example: [https://codesandbox.io/s/great-visvesvaraya-78yf6](https://codesandbox.io/s/great-visvesvaraya-78yf6?file=/App.svelte).
 
diff --git a/website/pages/index.mdx b/website/pages/index.mdx
index d0f4e24..d8466b3 100644
--- a/website/pages/index.mdx
+++ b/website/pages/index.mdx
@@ -33,6 +33,7 @@ export function Cobe() {
       theta: 0.2,
       dark: 1.1,
       diffuse: 3,
+      ambient: 0.1,
       mapSamples: 16000,
       mapBrightness: 1.8,
       mapBaseBrightness: .05,
diff --git a/website/pages/playground.mdx b/website/pages/playground.mdx
index ccbbc41..39ea5d2 100644
--- a/website/pages/playground.mdx
+++ b/website/pages/playground.mdx
@@ -18,6 +18,7 @@ export function Page() {
     mapBrightness: { value: 6, min: 0, max: 12 },
     mapBaseBrightness: { value: 0, min: 0, max: 1 },
     diffuse: { value: 1.2, min: 0, max: 5 },
+    ambient: { value: 0.1, min: 0, max: 1 },
     dark: { value: 1, min: 0, max: 1 },
     baseColor: { r: 60, g: 60, b: 60 },
     markerColor: { r: 255, g: 255, b: 255 },
@@ -47,6 +48,7 @@ export function Page() {
       phi: 0,
       theta: 0,
       diffuse: 1.2,
+      ambient: 0.1,
       mapSamples: paramsRef.current.mapSamples,
       mapBrightness: paramsRef.current.mapBrightness,
       baseColor: [0.3, 0.3, 0.3],
@@ -81,6 +83,7 @@ export function Page() {
         state.mapBrightness = paramsRef.current.mapBrightness
         state.mapBaseBrightness = paramsRef.current.mapBaseBrightness
         state.diffuse = paramsRef.current.diffuse
+        state.ambient = paramsRef.current.ambient
         state.baseColor = [
           paramsRef.current.baseColor.r / 255,
           paramsRef.current.baseColor.g / 255,