Rendering accuracy

In Shapr3D, rendering accuracy may differ from modeling accuracy. While Shapr3D uses a Parasolid modeling engine to create manufacturable solid bodies with exceptional precision, this precision doesn't necessarily apply to the display accuracy.

Depending on the hardware you use to run Shapr3D, you may notice a few display inaccuracies such as:

  • gaps between sketches and their fillings
  • gaps between bodies and their sketches
  • jagged edges

These display inaccuracies you notice don't affect the precision of your model.

Read on to learn more about the concepts behind modeling and rendering accuracy, and some troubleshooting tips to get the best display accuracy when you're modeling.

Modeling vs rendering precision

In CAD, modeling is the process of creating precise geometrical elements while rendering is the general term for displaying a precisely computed geometrical element.

Modeling precision

When you model, geometric calculations of created sketches and models such as boundaries, intersecting lines, intersecting bodies, or super complex splines, are carried out with a precision of at least 0.001 mm in the background.

The precision of geometric calculations in the background is easy to maintain for modeling, but this precision isn’t always easily carried out in rendering.

Rendering precision

To ensure the efficiency of the required hardware performance and rendering, the level of precision maintained in model calculations goes through a geometric simplification which causes you to only see an approximation of your model.

Complex models accuracy

Your complex models are still geometrically accurate regardless of reduced rendering quality.

The reduced rendering accuracy is just a visibility setting to ensure the efficiency of the required hardware performance and rendering.

With a reduced rendering quality, Shapr3D saves performance and can run flawlessly on a broad range of devices.

Troubleshoot rendering quality issues

You might experience reduced rendering quality more frequently when you zoom in a lot in the modeling space or have hundreds of bodies.

The scenarios below give you an overview of how zooming affects the rendering quality of the different areas in your model and what you can do to make the quality more accurate.

Reduced rendering accuracy on sketches

Cause

When zooming in on sketches, Shapr3D reduces the rendering quality to save on performance.

Symptoms

With the reduced quality, you may experience the following:

  • Visible gaps between sketch elements and the sketch profile
  • The camera intersects with the grid

In the example below the workspace is zoomed in with a grid resolution of 0.005 mm. The level of zoom shows an intersection between the camera and the grid and a gap between the sketch and the blue sketch profile.

rendering-1.png

Troubleshooting

Try these steps to improve the rendering accuracy:

  1. Check the grid resolution in the upper right corner, and zoom in or out to adjust the resolution accordingly.
  2. Carefully zoom out to get the right level of detail, or double-tap the Orientation Cube to give you a clear overview of the entire model.
Distance between bodies and sketches

Cause

When zooming into the edges of bodies, Shapr3D reduces the rendering quality to save on performance. The reduced rendering quality doesn't affect the computational accuracy of the model.

Symptoms

With the reduced quality, you may experience the following:

  • Visible gap between the edge of a body and the sketch from which it was created

In the example below, there is a visible gap between the sketch and the edge of the body.

rendering-2.png

Troubleshooting

To improve the rendering accuracy, adjust the level of zoom to achieve your level of desired rendering accuracy.

 

Curved edges appearing as jagged edges

Cause

  • When you have several bodies in your modeling space and you zoom in on edges, Shapr3D reduces the rendering quality to provide a smooth modeling experience.
  • To save on performance, the detail of rendering may decrease depending on your level of zoom. The reduced rendering quality doesn't affect the computational accuracy of the model.
  • Zooming in on faceted models consisting of polygons or straight elements eventually appear as jagged edges when zoomed in at a certain level.

    In the examples below, the model on the left shows a jagged but continuous edge, showing that it is a curved edge.
    The model on the right shows intersecting edges indicating that the upper edge is not a curve but an edge consisting of straight elements.

    rendering-3.png

     

    rendering-4.png
    Curved edge with reduced rendering quality

     

    Edge consisting of multiple straight elements 

Symptoms

With the reduced quality, you may experience the following:

  • Curved edges appear jagged the more you zoom
  • Consider using splines to achieve smoother edges

Troubleshooting

To improve the rendering accuracy, adjust the level of zoom to achieve your level of desired rendering accuracy.

Need more help?

If the troubleshooting steps above didn't improve the rendering accuracy of your model, try these additional tips:

If the issue persists, submit a request.

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