The Transparency subnode () adds transparency to 3D plots and to 2D plots that use a Height Expression subnode. Add it to make the plot more or less transparent. Contour, Image, Isosurface, Layered Material Link, Line, Max/Min, Mesh, Multislice, Radiation Pattern, Particle Tracing, Particle Trajectories, Point, Point Trajectories, Principal Stress, Slice, Streamline, Surface, Surface Slit, Table Annotation, Volume, Waterfall, and Whirl plots in 3D and Contour, Function, Histogram, Matrix Histogram, Table Histogram, Line, Optical Aberration, Surface, and Table Surface plots in 2D with a Height Expression support the Transparency attribute. In the Model Builder, add one of those plot types; then right-click the plot node and select Transparency.

In the Transparency field, or using the slider underneath, specify the transparency as a value between 0 (no transparency) and 1 (fully transparent).

In the Fresnel transmittance field, or using the slider underneath, specify the Fresnel transmittance as a value between 0 (no transmittance) and 1 (full transmittance). Fresnel transmittance results in that the transparency depends on the angle of incidence, which can improve realism.