Presentation mode (beta, only in eShare App)

Presentation mode is a visualization mode for visualizing the 3D model with emphasis on lighting options and enhanced quality. The visualization is based on rendering technology called ray tracing. The mode is in beta version, which means that the functionality is limited and possibly unstable.

Presentation mode is only available in eShare App.

Presentation mode is launched from Visualization control > Show in Presentation Mode. See Show in Presentation Mode.

Prerequisites

  • Windows 10 or later

  • Hardware accelerated ray tracing support in the graphics processor

  • A GPU with a high amount of VRAM is recommended. 6 GB is sufficient for small and medium-sized models, but 12 GB or even more is required for larger models.

  • Graphics drivers supporting Vulkan 1.3 or later:

    • Nvidia

      • All Nvidia RTX series GPUs

      • Driver 473.11 or later

    • AMD

      • AMD Radeon RX 6000 series or higher GPUs

      • Driver 22.2.1 or later

    • Intel

      • All Intel Arc series GPUs (Arc GPU has not been tested and support is not guaranteed, use at your discretion)

      • Any driver since 2023 should support Vulkan 1.3

Rendering features in presentation mode

Presentation mode deploys a rendering technique called ray tracing to render a scene with realistic and physically based lighting.

Lighting model and lighting sources

Presentation mode attempts to solve global illumination for a particular scene by taking into account lighting from direct and indirect light sources. Direct light sources include the sun, spotlight, and the sky. Indirect light is the light that bounces around in the scene. Indirect lighting is simulated with path tracing, where any single path has a maximum ray depth of 3 (i.e. 2 bounces).

Sun

Sun is modeled as an area light source in the shape of a circular disk. This disk has an angular diameter of 0.53° on the sky, which is on average the same size as the actual sun as seen from the earth. This disk shaped area light will produce physically accurate soft shadows.

Sky

The sky is rendered using a realistic atmosphere model that approximates the earth's atmosphere. The atmosphere is modeled by Rayleigh and Mie scattering, which takes into account the different scattering profiles for different wavelengths in the atmosphere. In effect, the color and light output from the sky is accurately affected by the position of the sun.

Spotlight

This is a single light source that can be moved within the scene. The light source is a point light with customizable conical radiation pattern.

Materials

Presentation mode can model light interaction with two different material types: diffuse and specular. The first material models fully matte Lambertian diffuse surfaces. The second material type is used for shiny surfaces with varying roughness and reflectance properties. The specular materials are modeled with GGX microfacet model.

 

Related topics

Visualization control