A molecular scene can be scientifically correct and still be difficult to read. Bonds may blend into one another, depth can be hard to judge, and a screenshot that looked good in the viewport may not fit a slide or a paper. Before changing the model itself, try tuning SAMSON’s rendering and capture preferences: these settings can improve how the structure is presented without changing its molecular coordinates.
Open Interface > Preferences, or use Ctrl+K on Windows and Linux, or Cmd+, on Mac. The Preferences search is a quick way to locate a setting. If Automatically test is checked, changes immediately affect the interface and rendering, making it easier to compare options as you work.
Start by making depth easier to read
When atoms and bonds overlap visually, it can be difficult to tell which parts of a structure are nearer or farther away. Ambient occlusion and shadows can help communicate that depth.
In Rendering > Ambient occlusion, SAMSON offers two approaches. Screen-space ambient occlusion is an efficient approximation, though its appearance is sensitive to camera distance. Object-space ambient occlusion is more realistic but slower. Try the screen-space option first when you want a quick improvement, then compare object-space rendering if the scene and your hardware allow it.
Shadows can also make relative positions easier to perceive. If rendering feels sluggish on an older graphics card, the Preferences documentation suggests disabling shadows or choosing a lower preset. For selection outlines, setting outline opacity to zero can also improve graphics performance and reduce lag on older cards.
Choose a background that separates the structure
In Rendering > Background, choose the default SAMSON background, black, white, or a custom gradient with user-defined top and bottom colors. A useful way to decide is to check whether the background makes the parts you want viewers to notice easy to distinguish. If the structure has dark regions, try a lighter background; if it has light regions, try a darker one. This is a visual comparison, not a change to the underlying model.
Other effects are best used selectively. Anti-aliasing can smooth jagged edges; Fast Approximate Anti-Aliasing (FXAA) is typically efficient and can be activated on most recent graphics cards. Silhouettes can help separate regions at different depths. Bloom adds a halo around bright parts of the image, while depth of field blurs distant parts when enabled. These effects may suit a particular presentation, but they can also compete with structural detail. Compare the result with the effect off before deciding to keep it.
Set up the capture before you export
When the scene is ready, open Interface > Captures. You can choose where captures are saved, set a filename prefix, select JPG, PNG, or BMP, and choose a custom image size or a multiple of the viewport size. Press F10 to capture the viewport.
If you change the capture width or height, enable Preserve aspect ratio to maintain the image’s proportions. For a transparent background, select PNG and enable Transparent background; the option is specifically for saving in PNG format. A simple workflow is to set the background and rendering first, then choose the output size and format, and finally capture. That makes it easier to spot whether the structure remains legible at the dimensions you need.
These adjustments address a common presentation problem: improving clarity without mistaking a rendering change for a molecular change. For the complete list of categories and options, see the SAMSON Preferences documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON.