------ TODO ------
Voraca  0.96

------- BUGS --------

- Importance volume does not use complete information of volume if volume resolution % downscale !=0
- Histogram is one pixel too wide
- Shader::draw line 174: Reset of textureSlotCounter only works as expected if all textures assigned once or all textures assigned each frame. Mixing would break it.

------- OTHER --------

- Camera should be movable
- Shadows
	- Composition is not correct
	- Depending on step size
- New Viewport: Color Picker
- GLFW ERROR callback should be used