+- <b>Ray tracing</b> - specifies the default GPU ray-tracing parameters.
+ - <b>Depth</b> - defines maximum ray-tracing depth.
+ - <b>Specular reflections</b> - enables/disables specular reflections.
+ - <b>Adaptive anti-aliasing</b> - enables/disables adaptive anti-aliasing.
+ - <b>Shadows rendering</b> - enables/disables shadows rendering.
+ - <b>Transparent shadow</b> - enables/disables light propagation through transparent media.
+- <b>Light source</b> - allows to set default parameters for directional light source.
+ - <b>Color</b> - allows to change the color of light source.
+ - <b>Dx, Dy, Dz</b> - sets direction coordinates.