A molecular structure can be difficult to read even when the model itself is correct. At certain viewing angles, nearby and distant regions may blend together; jagged edges can distract from detail; and a selection outline may be hard to distinguish from the structure. These are visualization problems, not necessarily modeling problems.
SAMSON’s Preferences panel lets you tune the viewport to make depth, shape, and selection easier to interpret. The goal is not to turn on every visual effect. It is to make a few deliberate adjustments, check the result in your working view, and keep the settings that help you answer the question at hand.
Start with depth cues
Ambient occlusion darkens regions that are less exposed to light, helping the eye perceive depth in a molecular structure. In Preferences > Rendering > Ambient occlusion, SAMSON offers two types:
- Screen-space ambient occlusion is efficient, but its appearance is sensitive to camera distance.
- Object-space ambient occlusion is more realistic, but slower.
If your view changes substantially as you zoom, keep the screen-space limitation in mind: the apparent shading may shift with camera distance. For an efficient first pass, try screen-space ambient occlusion. If its appearance is not suitable and performance allows, compare it with object-space ambient occlusion.
Shadows can also help you judge relative positions. If the viewport still feels visually flat, compare the view with shadows enabled. On an older graphics card, the documentation suggests disabling shadows or choosing the lower preset if performance is a concern.
Reduce distracting edges
Jagged edges can make a detailed view feel rough, especially when you are inspecting shapes or preparing a capture. Anti-aliasing smooths those edges. SAMSON’s documentation notes that Fast Approximate Anti-Aliasing (FXAA) is typically efficient and can be activated on most recent graphics cards. You can find this setting under Preferences > Rendering > Anti-aliasing.
Use the viewport to compare the result rather than assuming that every effect will help every scene. A setting that improves one view may be less noticeable in another, so evaluate it with the molecule and camera position you actually use.
Make selection easier to read
When selecting nodes, it helps to distinguish the node under the pointer from the nodes already selected. In Preferences > Rendering > Selection, you can adjust the selection color and opacity, decide whether to show the selection box, and change the highlighting and outline colors.
The highlighting color indicates the node you are hovering over, helping you see what will be selected. The outline color is used around highlighted or selected nodes. If outline rendering is contributing to lag on an older graphics card, setting the outline opacity to zero is one documented way to improve graphics performance.
Make changes in a controlled way
Open Preferences from Interface > Preferences, or use Ctrl+K on Windows and Linux, or Cmd+, on Mac. If you are not sure where a setting lives, use the search field in Preferences. When Automatically test is checked, preference changes immediately affect the interface and rendering, which makes it easier to compare options as you adjust them.
A useful sequence is to change one category at a time: first ambient occlusion or shadows for depth, then anti-aliasing for edge quality, then selection colors for interaction. This makes it easier to tell which adjustment actually improved the view—and to undo a change that made it harder to read.
For more details on the available categories and settings, see the SAMSON Preferences documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON.