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GI – Enables GI. You can specify the number of bounces for the traced GI rays.

Reflections – Enables reflections. You can specify the number of bounces for the traced reflection rays.

Coat – Enables rendering of clear coat in materials.

Refractions – Enables refractions. You can specify the number of bounces for the traced refraction rays.

Coat – Enables rendering of clear coat in materials.

Shading graph – When disabled all materials are approximated for performance. When enabled the original, non-approximated materials are used.

Bump map – Enables rendering of bump maps in materials. When disabled and Dynamic textures is enabled, reduces GPU memory consumption(scene dependent).

Normal map – Enables rendering of normal maps in materials. When disabled and Dynamic textures is enabled, reduces GPU memory consumption(scene dependent).

Enable lights –

Global light multiplier –

Noise threshold – Specifies the noise threshold that determines when to stop refining a pixel. Higher values allow more noise in the image, but the render is faster. Lower values help reduce the noise, but take more time to render. A value of 0.0 traces the entire image unconditionally.

Advanced

Light cache – Enables light cache.

LC filter primary – Enables filtering for primary rays.

LC cell size – Specifies the size of a single voxel, in scene units that is used for the Light cache calculations. Low values will produce more accurate lighting but will impact performance.

LC sample limit – Specifies the maximum samples per pixel for refining the image.

LC retrace threshold – Specifies the extent to which GI near corners are retraced instead of being read from the light cache. A value of 0.0 disables retracing.

Opacity maps (clip mode) – When enabled, opacity maps are rendered. Note that this option works as a clipper - it is either fully transparent or fully opaque. Option can also be accessed from the top toolbar icon(Image Modified).

Shading graph for glossy/GI – When disabled all materials are approximated for performance for glossy and GI rays. When enabled the original, non-approximated materials are used for glossy and GI rays.

Shading graph for normal maps – When disabled all materials with normal maps are approximated for performance (i.e. remove triplanar UVs or multitexture inputs for normal maps). When enabled the original, non-approximated materials are used.

Lights tree – When enabled uses the Light tree method to trace the lights rays. You can further set the number of samples.

Lights tree samples – Enables the environment importance sampling. This option aims to reduce the sampling noise on objects that are lit by the environment or have glossy reflections that see the environment. In most situations it is better to have Lights tree samples enabled. You might want to disable this option only when using a solid color for the environment. This option is available only when Environment mode is set to Texture.

Reflective GI caustics – Specifies the method how accurate the indirect lighting reflects from specular objects(ie mirror, chrome, etc.)

Off – Disables calculations for indirect lighting reflecting from specular objects.
Quick – Fast calculations for indirect lighting reflecting from specular objects that produce sufficient but less accurate results compared to Full(V-Ray) mode.
Full(V-Ray) – Accurate calculations for indirect lighting reflecting from specular objects that produces proper reflective caustics with similar to V-Ray results.

Clamp secondary rays – Suppresses the contribution of very bright secondary(GI/reflection/refraction) rays, which may typically cause excessive noise (fireflies). When enabled, the scene may turn out to be darker than the actual correct result.

Min reflection glossiness – Sets minimum reflection glossiness threshold for the materials. The effect is a faster render.

Bump map multiplier – Specifies a global multiplier for the bump map intensity.

Normal map multiplier – Specifies a global multiplier for the normal map intensity.

Enable dynamic textures – When enabled, textures will be downscaled based on where are they viewed from. This reduces GPU memory consumption(scene dependent).

Enable ray termination – When enabled, increases overall FPS of the scene but increases sampling noise.

Active Pixels Overlaypixels overlay – Displays an overlay that shows the pixels that are currently being rendered. Light pixels are the ones that are still being shaded and the dark ones have reached the set noise threshold.

Transparency Overlayoverlay – Displays a checkerboard pattern overlay that shows pixels with alpha < 1.0 that will not be rendered when saving a .png file with alpha.