docs: update README and screenshots

README.md

@@ -3,7 +3,7 @@
 ## Procedural
 
 <div align="center">
-  <img src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/procedural-ui.jpg" alt="screenshot of the procedural shader" />
+  <img src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/procedural-ui.jpg" alt="screenshot of the procedural shader with the UI" />
 
   <br/>
   <br/>
@@ -13,9 +13,9 @@
 
 <br/>
 
-This is a GLSL fragment shader I originally made on [Shadertoy](https://www.shadertoy.com/view/Ds3XRl) when learning raymarching. Later I switched to analytic raycasting for better performance. It's made by raycasting simple spheres with a bunch of fbm noises used for the normals and colors, and a complete hack for the atmosphere.
+This is a GLSL fragment shader I originally made on [Shadertoy](https://www.shadertoy.com/view/Ds3XRl) when learning raymarching. Later I switched to analytic raycasting for better performance. It's made by raycasting simple spheres with a bunch of fbm noises used for the normals and colors, and a fake atmosphere computed with distance functions.
 
-I wanted to display it on a web page so that I can make a nice GUI to tweak some uniforms. Here it is !
+I wanted to display it on a web page so that I can make a nice GUI to tweak the uniforms. Here it is !
 
 It runs at 60fps on my old low-end phone, so it should also be quite smooth on whatever device you have.
 
@@ -24,7 +24,7 @@ It runs at 60fps on my old low-end phone, so it should also be quite smooth on w
 ## Textures
 
 <div align="center">
-  <img src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/earth-ui.jpg" alt="screenshot of the earth shader" />
+  <img src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/earth-ui.jpg" alt="screenshot of the earth shader with the UI" />
 
   <br/>
   <br/>
@@ -34,17 +34,22 @@ It runs at 60fps on my old low-end phone, so it should also be quite smooth on w
 
 <br/>
 
-This one uses textures (colors, specular, bump) borrowed and adapted from NASA [Visible Earth](https://visibleearth.nasa.gov/collection/1484/blue-marble) collection in order to render a realistic view of our home planet. Still with a few controls, and no quality setting because it should already run at full fps on most devices.
+After the procedural version, I found a bunch of textures to display a realistic view of some planets of our solar system. Still with a few controls, and no quality setting because it should already run at full fps on most devices.
 
 ## Note
 
 If you want a minimalist setup to render GLSL shaders on a canvas like this one, you can check out the [little study](https://github.com/jsulpis/webgl-libs-comparison) I made before this project.
 
-## More samples
+## More renders
 
 <div>
-  <img height="200" alt="screenshot with different settings" src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/earth-1.jpg">
-  <img height="200" alt="screenshot with different settings" src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/procedural-1.jpg">
-  <img height="200" alt="screenshot with different settings" src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/procedural-2.jpg">
-  <img height="200" alt="screenshot with different settings" src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/procedural-3.jpg">
+  <img height="200" alt="a render of the Earth" src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/earth.jpg">
+  <img height="200" alt="a render of the Moon" src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/moon.jpg">
+  <img height="200" alt="a render of Mercury" src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/mercury.jpg">
+  <img height="200" alt="a render of Venus" src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/venus.jpg">
+  <img height="200" alt="a render of Mars" src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/mars.jpg">
+  <img height="200" alt="a render of Jupiter" src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/jupiter.jpg">
+  <img height="200" alt="a render of the procedural planet" src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/procedural-1.jpg">
+  <img height="200" alt="a render of the procedural planet" src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/procedural-2.jpg">
+  <img height="200" alt="a render of the procedural planet" src="https://raw.githubusercontent.com/jsulpis/realtime-planet-shader/main/screenshots/procedural-3.jpg">
 </div>

src/pages/mars.astro

@@ -28,7 +28,7 @@ import Layout from "../layouts/Layout.astro";
       uniforms: {
          ...defaultUniforms,
          uAtmosphereColor: [0.9, 0.15, 0],
-         uAtmosphereDensity: 0.1,
+         uAtmosphereDensity: 0.2,
          uQuality: Math.min(window.devicePixelRatio, 2),
          uPlanetColor,
          uStars,