Viz Artist User Guide

Version 5.2 | Published March 20, 2024 ©

Bloom

Bloom is a post processing effect which mimics the behavior of real-world cameras, where bright objects (lights, glowing objects) leak into their surroundings. The Bloom shader is directly integrated into Viz Engine Render Pipeline and makes use of the HDR rendering capabilities. It uses multi-pass rendering with downscale and upscale steps to generate the blur that is used for compositing.

The settings for the Bloom Effect are located in the Scene > Rendering Menu:
images/download/attachments/140820011/image-2023-11-3_9-21-6.png

It is used to replace the deprecated Glow plug-in.

Parameters

Parameter

Description

threshold

Defines the basic brightness threshold. A pixel that is below this threshold is not used in the blur steps.

softThreshold

Additional threshold to soften the pixel selection instead of a hard-cut.

intensity

Scales the bloom image colors before adding it to the original image.

iterations

How many render passes are used to calculate the boom. Higher value means higher quality.

Key Intensity

Specifies how much of the effect is used within the key signal.

Examples

Screenshot

Bloom Settings

images/download/attachments/140820011/image2022-4-8_11-43-48.png

Bloom Disabled


images/download/attachments/140820011/image2022-4-8_11-44-52.png

Bloom Enabled

threshold = 1softThreshold = 0
intensity = 1

images/download/attachments/140820011/image2022-4-8_11-45-14.png

Bloom Enabled

threshold = 0.5softThreshold = 0
intensity = 1

images/download/attachments/140820011/image2022-4-8_11-45-46.png

Bloom Enabled

threshold = 2softThreshold = 1
intensity = 10

images/download/attachments/140820011/image2022-4-8_11-47-6.png

Bloom Enabled

threshold = 2softThreshold = 1
intensity = 2iterations = 4