# Post process

Using post processing can dramatically improve the final look of your scene.

Post process can impacts the performance by a lot depending on your device. There's a global checkbox to disable all the postprocess, so that you can quickly go back to sculpting/modeling without loosing your presets. For PBR rendering, Ambient Occlusion, Reflection and Tone Mapping should be enabled.

However, most of the time you want the postprocess to be disabled when you are sculpting, to focus on the shape itself of the rendering.

# Quality

Simply check the options (Max samples and Full Resolution) if you want to improve the quality of the postprocess.
Full resolution can makes a big difference with Ambient Occlusion.

# Reflection (SSR)

With this option, objects can reflects other objects in the scene, as long as the objects are visible on the screen. If you have metallic and shiny objects in your scene, then this option should probably be used. This effect is only effective with PBR mode.

SSR off SSR off

# Ambient Occlusion (SSAO)

Ambient occlusion will darken areas where the light has less chance of reaching (corners, etc). The effect only depends on the model geometry.

Mode Description
Strength Intensity of the effect
Radius How widespread the effect is
Curvature bias How sensitive the effect is relative to the surface variation
SSAO off SSAO off

# Depth of Field (DOF)

Add a blur effect on the region that are outside the focus.

Simply tap on your model to change the focus point.

DOF off DOF focus on far ring DOF focus on close ring

# Bloom

Blooms will make the bright area of your scene glow.

Bloom off Bloom with radius 0 Bloom with radius 1

# Tone Mapping

A Tone Mapping operator is an operation that will remap HDR values to the [0, 1] range (what can be displayed on your screen). If you don't use Tone Mapping or leave it to none, then any values higher than 1 will be clamped to 1.

You can adjust the overall image with exposure, contrast and saturation.

Tone Mappin off Tone Mapping on

Notice that with Tone Mapping disabled, some details disappeared because some pixels are too much exposed.

# Curvature

Accentuates edges of the model.

Curvature off Curvature on

# Chromatic Aberration

Simulate the lens artefacts with light being decomposed around the screen edges.

Chromatic off Chromatic on

# Vignette

Simulate the lens artefacts by darkening the screen edges.

Vignette off Vignette on

# Grain

Add a grain effect, it can break the over-cleanliness of 3d images.

Grain off Grain on

# Sharpness

Sharpen the model edges.

Sharpness off Sharpness on

# Temporal Antialiasing (TAA)

This effect is enabled by default, this is not an artistic effect but a quality one.

When the camera doesn't move, Nomad re-uses the previous frames to improve the quality of the overall image. TAA tries to do the same thing when the camera is moving, by reprojecting the previous frames onto the new view point. Most of the time it should be ok, but it can introduces some artefacts when the reprojection is a bit off (ghosting artefacts).

The effects that benefits the most from the accumulation are Ambient Occlusion, Reflection and Ambient Occlusion, Depth of Field and Bloom.