A molecular scene can contain all the right structural information and still be difficult to interpret. Overlapping parts may seem to merge, the distance between objects may be unclear, and jagged edges can distract from the structure itself. Before changing the molecular model, try adjusting how the viewport communicates depth and separation.
SAMSON’s real-time rendering effects can help address these problems while you work. The useful starting point is not to turn on every effect at once, but to identify what is hard to read and choose a tool that addresses it.
Start with depth cues
Ambient occlusion darkens regions that are less exposed to light, adding cues about how molecular parts sit relative to one another. Screen-space ambient occlusion is a quick approximation and can improve depth perception; its appearance is sensitive to camera distance. Object-space ambient occlusion is more realistic, but slower.
Compare the same view with ambient occlusion off and on. In the example below, the Ribbons model of 1AF6 is shown first without ambient occlusion and then with screen-space ambient occlusion. Looking at the same scene both ways makes it easier to judge whether the extra shading clarifies the structure or makes it feel too dark.
Shadows are another useful cue when you need to understand the relative position of objects, such as a molecule and a surface behind it. If shadows make the viewport slow on an older graphics card, try disabling them or selecting a lower preset.
Silhouettes can help separate regions at different depths, particularly in ribbon representations. They add outlines, so use them when boundaries are hard to distinguish and check that the added edges do not overwhelm the model.
Make edges easier to follow
Jagged edges can make a structure look noisy, especially when you are inspecting a detailed view. Anti-aliasing smooths those edges. FXAA is described as an efficient option for many recent graphics cards; multisampling can also be adjusted. In the documented examples, the higher-quality choice uses FXAA with multisampling set to 2, while the best-speed choice uses a multisampling factor of 1 with no FXAA.
There is a trade-off: anti-aliasing requires more GPU rendering and may slow visualization for large systems. If interaction becomes less responsive, reduce the quality setting or switch it off while exploring, then enable it again when you need a cleaner view.
Use focus effects selectively
Depth of field simulates camera focus by blurring distant parts of the molecule. Fog progressively blends distant objects with the background: before the near distance there is no fog, and beyond the far distance nodes become invisible. These effects can help direct attention toward a foreground region, but they can also obscure details you need to inspect. Try them for a specific viewing goal, and turn them off if distant structural context matters.
For a simple troubleshooting sequence, keep the camera and model fixed, then test one change at a time: ambient occlusion for depth, shadows for relative positions, silhouettes for region boundaries, and anti-aliasing for jagged edges. This makes it easier to see which adjustment is helping. Quick switches and presets are available in Visualization > Options; detailed parameters are in the Rendering section of Preferences. These effects change the interactive viewport. For final-quality offline output, use the separate rendering workflow.
For more details about rendering effects and their settings, see the SAMSON rendering effects documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON.