Scene Properties Panel

All the scene-related properties like background, environment, floor and so on are located in the scene properties panel:

Koru scene properties panel

See below for the details of all the controls in the panel.


Here you define what is displayed behind your scene. There are 7 options to choose from:

  • Environment - you see the same environment image that is used for reflections and lighting, that’s the default;
  • Transparent - there is no background at all, it is transparent. Note that semi-transparent mediums need a proper opaque background in order to be physically-correct;
  • Plane Background - Koru displays the image you load, optionally tinted by the color you selected;
  • Spherical Background - its pretty much the same as the “Environment” option, but you can load a different image instead;
  • Radial Gradient - Koru displays radial gradient of two colors from the center of the scene to its edges;
  • Vertical Gradient - same as above, but gradient runs fron top top bottom;
  • Horizontal Gradient - same as above, but gradient runs from center to edges.

Then come the controls:

  • Color - lets you choose background image and main tint color (disabled in “Environment” and “Transparent” background modes);
  • Gradient color - defines secondary tint color, enabled in gradient background modes;
  • Blur - lets you blur background image, works in spherical background mode.


Environment is the essential part of the scene, as it is used for reflections. It is important to use HDR images for environment to make reflections nice. Koru comes with some HDR environment textures in its Materials Library, but you can use your own images, too.

Here are the controls you can use:

  • Color - lets you load an environment image and adjust its tint;
  • Intensity - controls the brightness of the environment;
  • Vertical offset - lets you move environment sphere up or down to better match the scene;
  • Horizontal rotation - rotates enviromnent scene left or right, so you can find better environment reflections layout;
  • Vertical rotation - the same as above, but environment is rotated around another axis.

Floor Settings

This section lets you configure the floor. Note that you can edit “Floor” material if you want to customize the floor more.

  • Show floor - toggles floor on and off;
  • Shadow level - controls the darkness of the floor shadow that Koru computes.
  • Use background texture - tells Koru to map the environment that way, so the bottom part of the environment becomes the floor;
  • Texture scale - lets you scale environment image to better match it to the scene.

Glow effect for speculars

Koru adds some glow around bright speculars to make them even brighter. You can control this here:

  • Enabled - turns the glow effect on and off;
  • Level - controls the amount of glowing;
  • Threshold - sets the minimal brightness that is enhanced by glow.


Koru lets you add your own image on top of the rendered scene. Use Location control to select where to put the image, Scale parameter helps to adjust its size. Check Resize with viewport box if you want the watermark to be automatically scaled depending on the viewport resolution. Leave it unchecked if you want it to have its original size in pixels regardless of the viewport size.