diff --git a/.npmignore b/.npmignore
index 130f134..cd3ca40 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,5 +1,2 @@
-.*
-**/tsconfig.json
-**/webpack.config.js
 node_modules
 src
diff --git a/src/graphics/graphics-library/frame-buffer/default-frame-buffer.ts b/src/graphics/graphics-library/frame-buffer/default-frame-buffer.ts
index de26568..be495ad 100644
--- a/src/graphics/graphics-library/frame-buffer/default-frame-buffer.ts
+++ b/src/graphics/graphics-library/frame-buffer/default-frame-buffer.ts
@@ -1,8 +1,8 @@
 import { FrameBuffer } from './frame-buffer';
 
 export class DefaultFrameBuffer extends FrameBuffer {
-  constructor(gl: WebGL2RenderingContext, enableHighDpiRendering: boolean) {
-    super(gl, enableHighDpiRendering);
+  constructor(gl: WebGL2RenderingContext) {
+    super(gl);
     this.frameBuffer = null;
     this.setSize();
   }
diff --git a/src/graphics/graphics-library/frame-buffer/frame-buffer.ts b/src/graphics/graphics-library/frame-buffer/frame-buffer.ts
index 29a9a9e..1ad4e78 100644
--- a/src/graphics/graphics-library/frame-buffer/frame-buffer.ts
+++ b/src/graphics/graphics-library/frame-buffer/frame-buffer.ts
@@ -2,16 +2,14 @@ import { vec2 } from 'gl-matrix';
 
 export abstract class FrameBuffer {
   public renderScale = 1;
+  public enableHighDpiRendering = false;
 
   protected size = vec2.create();
 
   // null means the default framebuffer
   protected frameBuffer: WebGLFramebuffer | null = null;
 
-  constructor(
-    protected gl: WebGL2RenderingContext,
-    private enableHighDpiRendering: boolean
-  ) {}
+  constructor(protected gl: WebGL2RenderingContext) {}
 
   public bindAndClear(colorInput?: WebGLTexture) {
     this.gl.bindFramebuffer(this.gl.FRAMEBUFFER, this.frameBuffer);
diff --git a/src/graphics/graphics-library/frame-buffer/intermediate-frame-buffer.ts b/src/graphics/graphics-library/frame-buffer/intermediate-frame-buffer.ts
index 716a743..ff99787 100644
--- a/src/graphics/graphics-library/frame-buffer/intermediate-frame-buffer.ts
+++ b/src/graphics/graphics-library/frame-buffer/intermediate-frame-buffer.ts
@@ -5,8 +5,8 @@ export class IntermediateFrameBuffer extends FrameBuffer {
   private frameTexture: WebGLTexture;
   private floatLinearEnabled = false;
 
-  constructor(gl: WebGL2RenderingContext, enableHighDpiRendering: boolean) {
-    super(gl, enableHighDpiRendering);
+  constructor(gl: WebGL2RenderingContext) {
+    super(gl);
 
     enableExtension(gl, 'EXT_color_buffer_float');
 
diff --git a/src/graphics/rendering/renderer.ts b/src/graphics/rendering/renderer.ts
index 8e1a9cb..1fae188 100644
--- a/src/graphics/rendering/renderer.ts
+++ b/src/graphics/rendering/renderer.ts
@@ -1,12 +1,14 @@
 import { vec2 } from 'gl-matrix';
 import { Drawable } from '../../drawables/drawable';
+import { RuntimeSettings } from './runtime-settings';
 
 export interface Renderer {
   readonly canvasSize: vec2;
+  readonly viewAreaSize: vec2;
   readonly insights: any;
 
   setViewArea(topLeft: vec2, size: vec2): void;
-  setCursorPosition(position: vec2): void;
+  setRuntimeSettings(overrides: Partial<RuntimeSettings>): void;
   addDrawable(drawable: Drawable): void;
   autoscaleQuality(deltaTime: DOMHighResTimeStamp): void;
   renderDrawables(): void;
diff --git a/src/graphics/rendering/rendering-pass.ts b/src/graphics/rendering/rendering-pass.ts
index a757024..5f24d3d 100644
--- a/src/graphics/rendering/rendering-pass.ts
+++ b/src/graphics/rendering/rendering-pass.ts
@@ -5,21 +5,20 @@ import { FrameBuffer } from '../graphics-library/frame-buffer/frame-buffer';
 import { UniformArrayAutoScalingProgram } from '../graphics-library/program/uniform-array-autoscaling-program';
 
 export class RenderingPass {
+  public tileMultiplier = 8;
+  public isWorldInverted = false;
+
   private drawables: Array<Drawable> = [];
   private program: UniformArrayAutoScalingProgram;
 
-  constructor(
-    gl: WebGL2RenderingContext,
-    private frame: FrameBuffer,
-    private tileMultiplier: number
-  ) {
+  constructor(gl: WebGL2RenderingContext, private frame: FrameBuffer) {
     this.program = new UniformArrayAutoScalingProgram(gl);
   }
 
   public async initialize(
     shaderSources: [string, string],
     descriptors: Array<DrawableDescriptor>,
-    substitutions: { [name: string]: any }
+    substitutions: { [name: string]: any } = {}
   ): Promise<void> {
     await this.program.initialize(shaderSources, descriptors, substitutions);
   }
@@ -43,7 +42,10 @@ export class RenderingPass {
 
     for (let x = -1; x < 1; x += stepsInNDC) {
       for (let y = -1; y < 1; y += stepsInNDC) {
-        const uniforms = { ...commonUniforms, maxMinDistance: radiusInNDC };
+        const uniforms = {
+          ...commonUniforms,
+          maxMinDistance: radiusInNDC * (this.isWorldInverted ? -1 : 1),
+        };
 
         const ndcBottomLeft = vec2.fromValues(x, y);
 
diff --git a/src/graphics/rendering/runtime-settings.ts b/src/graphics/rendering/runtime-settings.ts
new file mode 100644
index 0000000..ffe4781
--- /dev/null
+++ b/src/graphics/rendering/runtime-settings.ts
@@ -0,0 +1,8 @@
+import { vec3 } from 'gl-matrix';
+
+export interface RuntimeSettings {
+  enableHighDpiRendering: boolean;
+  tileMultiplier: number;
+  isWorldInverted: boolean;
+  ambientLight: vec3;
+}
diff --git a/src/graphics/rendering/shaders/shading-fs.glsl b/src/graphics/rendering/shaders/shading-fs.glsl
index cd1addc..e4123dd 100644
--- a/src/graphics/rendering/shaders/shading-fs.glsl
+++ b/src/graphics/rendering/shaders/shading-fs.glsl
@@ -4,7 +4,6 @@ precision lowp float;
 
 #define INFINITY 1000.0
 #define INTENSITY_INSIDE_RATIO 0.5
-#define AMBIENT_LIGHT vec3(0.25, 0.15, 0.25)
 #define SHADOW_HARDNESS 150.0
 #define HARD_SHADOW_TRACE_COUNT {hardShadowTraceCount}
 #define SOFT_SHADOW_TRACE_COUNT {softShadowTraceCount}
@@ -19,6 +18,8 @@ uniform sampler2D distanceTexture;
 in vec2 position;
 in vec2 uvCoordinates;
 
+uniform vec3 ambientLight;
+
 vec3[3] colors = vec3[](
     {palette}
 );
@@ -127,7 +128,7 @@ float shadowTransparency(float startingDistance, float lightCenterDistance, vec2
 
 out vec4 fragmentColor;
 void main() {
-    vec3 lighting = AMBIENT_LIGHT;
+    vec3 lighting = ambientLight;
     
     vec3 colorAtPosition;
     float startingDistance = getDistance(uvCoordinates, colorAtPosition);
diff --git a/src/graphics/rendering/startup-settings.ts b/src/graphics/rendering/startup-settings.ts
new file mode 100644
index 0000000..2eb3be4
--- /dev/null
+++ b/src/graphics/rendering/startup-settings.ts
@@ -0,0 +1,5 @@
+export interface StartupSettings {
+  enableStopwatch: boolean;
+  softShadowTraceCount: string;
+  hardShadowTraceCount: string;
+}
diff --git a/src/graphics/rendering/uniforms-provider.ts b/src/graphics/rendering/uniforms-provider.ts
index eaf7501..79615ef 100644
--- a/src/graphics/rendering/uniforms-provider.ts
+++ b/src/graphics/rendering/uniforms-provider.ts
@@ -1,6 +1,8 @@
-import { mat2d, vec2 } from 'gl-matrix';
+import { mat2d, vec2, vec3 } from 'gl-matrix';
 
 export class UniformsProvider {
+  public ambientLight = vec3.fromValues(0.25, 0.15, 0.25);
+
   private scaleWorldLengthToNDC = 1;
   private transformWorldToNDC = mat2d.create();
 
@@ -8,17 +10,15 @@ export class UniformsProvider {
   private worldAreaInView = vec2.create();
   private squareToAspectRatio = vec2.create();
   private uvToWorld = mat2d.create();
-  private cursorPosition = vec2.create();
 
   public softShadowsEnabled?: boolean;
 
   public constructor(private gl: WebGL2RenderingContext) {}
 
   public getUniforms(uniforms: any): any {
-    const cursorPosition = this.uvToWorldCoordinate(this.cursorPosition);
     return {
       ...uniforms,
-      cursorPosition,
+      ambientLight: this.ambientLight,
       uvToWorld: this.uvToWorld,
       worldAreaInView: this.worldAreaInView,
       squareToAspectRatio: this.squareToAspectRatio,
@@ -51,6 +51,10 @@ export class UniformsProvider {
     );
   }
 
+  public getViewArea(): vec2 {
+    return this.worldAreaInView;
+  }
+
   public setViewArea(topLeft: vec2, size: vec2) {
     this.worldAreaInView = size;
 
@@ -87,8 +91,4 @@ export class UniformsProvider {
     this.uvToWorld = mat2d.fromTranslation(mat2d.create(), this.viewAreaBottomLeft);
     mat2d.scale(this.uvToWorld, this.uvToWorld, this.worldAreaInView);
   }
-
-  public setCursorPosition(position: vec2): void {
-    this.cursorPosition = position;
-  }
 }
diff --git a/src/graphics/rendering/webgl2-renderer-settings.ts b/src/graphics/rendering/webgl2-renderer-settings.ts
deleted file mode 100644
index 7d9272e..0000000
--- a/src/graphics/rendering/webgl2-renderer-settings.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-export interface WebGl2RendererSettings {
-  enableHighDpiRendering: boolean;
-  enableStopwatch: boolean;
-  tileMultiplier: number;
-  shaderMacros: {
-    softShadowTraceCount: string;
-    hardShadowTraceCount: string;
-    // ambientColor: vec3;
-    // defaultIsInside: boolean;
-  };
-}
diff --git a/src/graphics/rendering/webgl2-renderer.ts b/src/graphics/rendering/webgl2-renderer.ts
index 08040b3..18e92c1 100644
--- a/src/graphics/rendering/webgl2-renderer.ts
+++ b/src/graphics/rendering/webgl2-renderer.ts
@@ -11,12 +11,13 @@ import { Insights } from './insights';
 import { Renderer } from './renderer';
 import { RenderingPass } from './rendering-pass';
 import { RenderingPassName } from './rendering-pass-name';
+import { RuntimeSettings } from './runtime-settings';
 import distanceFragmentShader from './shaders/distance-fs.glsl';
 import distanceVertexShader from './shaders/distance-vs.glsl';
 import lightsFragmentShader from './shaders/shading-fs.glsl';
 import lightsVertexShader from './shaders/shading-vs.glsl';
+import { StartupSettings } from './startup-settings';
 import { UniformsProvider } from './uniforms-provider';
-import { WebGl2RendererSettings } from './webgl2-renderer-settings';
 
 type Passes = { [key in keyof typeof RenderingPassName]: RenderingPass };
 
@@ -28,38 +29,49 @@ export class WebGl2Renderer implements Renderer {
   private lightingFrameBuffer: DefaultFrameBuffer;
   private passes: Passes;
   private autoscaler: FpsAutoscaler;
-  private settings: WebGl2RendererSettings;
 
-  private static defaultSettings: WebGl2RendererSettings = {
-    enableHighDpiRendering: true,
-    enableStopwatch: true,
-    tileMultiplier: 8,
-    shaderMacros: {
-      softShadowTraceCount: '128',
-      hardShadowTraceCount: '32',
+  private applyRuntimeSettings: {
+    [key: string]: (value: any) => void;
+  } = {
+    enableHighDpiRendering: (v) => {
+      this.distanceFieldFrameBuffer.enableHighDpiRendering = v;
+      this.lightingFrameBuffer.enableHighDpiRendering = v;
+    },
+    tileMultiplier: (v) => {
+      this.passes[RenderingPassName.distance].tileMultiplier = v;
+      this.passes[RenderingPassName.pixel].tileMultiplier = v;
+    },
+    isWorldInverted: (v) => {
+      this.passes[RenderingPassName.distance].isWorldInverted = v;
+      this.passes[RenderingPassName.pixel].isWorldInverted = v;
+    },
+    ambientLight: (v) => {
+      this.uniformsProvider.ambientLight = v;
     },
   };
 
+  private static defaultStartupSettings: StartupSettings = {
+    enableStopwatch: true,
+    softShadowTraceCount: '128',
+    hardShadowTraceCount: '32',
+  };
+
+  setRuntimeSettings(overrides: Partial<RuntimeSettings>): void {
+    Object.entries(overrides).forEach((k, v) => {
+      this.applyRuntimeSettings[(k as unknown) as string](v);
+    });
+  }
+
   constructor(
     private canvas: HTMLCanvasElement,
-    private descriptors: Array<DrawableDescriptor>,
-    private palette: Array<vec3>,
-    settingsOverrides: Partial<WebGl2RendererSettings>
+    private descriptors: Array<DrawableDescriptor>
   ) {
-    this.settings = { ...WebGl2Renderer.defaultSettings, ...settingsOverrides };
-
     this.gl = getWebGl2Context(canvas);
 
     ParallelCompiler.initialize(this.gl);
 
-    this.distanceFieldFrameBuffer = new IntermediateFrameBuffer(
-      this.gl,
-      this.settings.enableHighDpiRendering
-    );
-    this.lightingFrameBuffer = new DefaultFrameBuffer(
-      this.gl,
-      this.settings.enableHighDpiRendering
-    );
+    this.distanceFieldFrameBuffer = new IntermediateFrameBuffer(this.gl);
+    this.lightingFrameBuffer = new DefaultFrameBuffer(this.gl);
 
     this.passes = this.createPasses();
 
@@ -72,14 +84,6 @@ export class WebGl2Renderer implements Renderer {
       softShadowsEnabled: (v) =>
         (this.uniformsProvider.softShadowsEnabled = v as boolean),
     });
-
-    if (this.settings.enableStopwatch) {
-      try {
-        this.stopwatch = new WebGlStopwatch(this.gl);
-      } catch {
-        // no problem
-      }
-    }
   }
 
   @Insights.measure('create render passes')
@@ -87,26 +91,25 @@ export class WebGl2Renderer implements Renderer {
     return {
       [RenderingPassName.distance]: new RenderingPass(
         this.gl,
-        this.distanceFieldFrameBuffer,
-        this.settings.tileMultiplier
-      ),
-      [RenderingPassName.pixel]: new RenderingPass(
-        this.gl,
-        this.lightingFrameBuffer,
-        this.settings.tileMultiplier
+        this.distanceFieldFrameBuffer
       ),
+      [RenderingPassName.pixel]: new RenderingPass(this.gl, this.lightingFrameBuffer),
     };
   }
 
   @Insights.measure('initialize render passes')
-  public async initialize(): Promise<void> {
+  public async initialize(
+    palette: Array<vec3>,
+    settingsOverrides: Partial<StartupSettings>
+  ): Promise<void> {
+    const settings = { ...WebGl2Renderer.defaultStartupSettings, ...settingsOverrides };
+
     const promises: Array<Promise<void>> = [];
 
     promises.push(
       this.passes[RenderingPassName.distance].initialize(
         [distanceVertexShader, distanceFragmentShader],
-        this.descriptors.filter(WebGl2Renderer.hasSdf),
-        this.settings.shaderMacros
+        this.descriptors.filter(WebGl2Renderer.hasSdf)
       )
     );
 
@@ -115,8 +118,9 @@ export class WebGl2Renderer implements Renderer {
         [lightsVertexShader, lightsFragmentShader],
         this.descriptors.filter((d) => !WebGl2Renderer.hasSdf(d)),
         {
-          palette: this.generatePaletteCode(this.palette),
-          ...this.settings.shaderMacros,
+          palette: this.generatePaletteCode(palette),
+          hardShadowTraceCount: settings.hardShadowTraceCount,
+          softShadowTraceCount: settings.softShadowTraceCount,
         }
       )
     );
@@ -124,6 +128,14 @@ export class WebGl2Renderer implements Renderer {
     ParallelCompiler.compilePrograms();
 
     await Promise.all(promises);
+
+    if (settings.enableStopwatch) {
+      try {
+        this.stopwatch = new WebGlStopwatch(this.gl);
+      } catch {
+        // no problem
+      }
+    }
   }
 
   public get insights(): any {
@@ -191,8 +203,8 @@ export class WebGl2Renderer implements Renderer {
     this.uniformsProvider.setViewArea(topLeft, size);
   }
 
-  public setCursorPosition(position: vec2) {
-    this.uniformsProvider.setCursorPosition(position);
+  public get viewAreaSize(): vec2 {
+    return this.uniformsProvider.getViewArea();
   }
 
   public get canvasSize(): vec2 {
diff --git a/src/helper/wait-while-false.ts b/src/helper/wait-while-false.ts
deleted file mode 100644
index 1e0f708..0000000
--- a/src/helper/wait-while-false.ts
+++ /dev/null
@@ -1,29 +0,0 @@
-export const waitWhileFalse = (body: () => boolean): Promise<void> => {
-  let resolveOnDone: () => void;
-  let rejectOnDone: (e: Error) => void;
-
-  const onDone = new Promise<void>((resolve, reject) => {
-    resolveOnDone = resolve;
-    rejectOnDone = reject;
-  });
-
-  const waiter = () => {
-    let success: boolean;
-
-    try {
-      success = body();
-    } catch (e) {
-      rejectOnDone(e);
-      return;
-    }
-
-    if (success) {
-      resolveOnDone();
-    } else {
-      requestAnimationFrame(waiter);
-    }
-  };
-
-  waiter();
-  return onDone;
-};
diff --git a/src/main.ts b/src/main.ts
index 2b7b471..9c463d8 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,8 +1,8 @@
 import { vec3 } from 'gl-matrix';
 import { DrawableDescriptor } from './drawables/drawable-descriptor';
 import { Renderer } from './graphics/rendering/renderer';
+import { StartupSettings } from './graphics/rendering/startup-settings';
 import { WebGl2Renderer } from './graphics/rendering/webgl2-renderer';
-import { WebGl2RendererSettings } from './graphics/rendering/webgl2-renderer-settings';
 import { applyArrayPlugins } from './helper/array';
 
 export { Drawable } from './drawables/drawable';
@@ -30,11 +30,11 @@ export const compile = async (
   canvas: HTMLCanvasElement,
   descriptors: Array<DrawableDescriptor>,
   palette: Array<vec3>,
-  settings: Partial<WebGl2RendererSettings> = {}
+  settings: Partial<StartupSettings> = {}
 ): Promise<Renderer> => {
   applyArrayPlugins();
 
-  const renderer = new WebGl2Renderer(canvas, descriptors, palette, settings);
-  await renderer.initialize();
+  const renderer = new WebGl2Renderer(canvas, descriptors);
+  await renderer.initialize(palette, settings);
   return renderer;
 };