Look

Rendered objects get a material per component class and visible cemented interfaces of doublet and triplet lenses. Two looks are available, which are selected via set_render_look:

• :modern (default): a restrained palette of clear, slightly tinted glass with highlights, metallic mirrors and neutral mechanics. Only the glass (:refractive, :coating and :interface) gets faint silhouettes, i.e. its feature edges at 50 % of the opacity of the :cad look, such that lenses stay readable in front of a housing

• :cad: saturated materials with thin dark lines along the feature edges, like a CAD program

set_render_look(:cad)

material	components	:modern	:cad
:refractive	lenses, prisms, plates, windows	clear glass, 0.3	light blue, 0.5
:reflective	mirrors, retroreflector	metallic silver	silver
:coating	beamsplitter coatings	pale violet, 0.28	magenta, 0.6
:polarizer	polarization filters	dark slate, 0.75	dark teal, 0.8
:detector	detectors	graphite	dark blue
:mechanics	mechanics, dummies and other objects	neutral grey	mid grey
:interface	cemented interfaces of doublets, triplets	pale amber, 0.15	amber, 0.25

The numbers are the opacity alpha of transparent materials.

Besides the color and the opacity, each material sets the transparency, diffuse, specular and shininess attributes of the mesh plot. The parts of composite objects are rendered with their own class, e.g. the prisms and the coating of a CubeBeamsplitter. The following keyword arguments of render! change the look of an object:

• material = nothing: one of the materials above, overrides the component class for all parts of the object

• color, alpha, transparency, ...: override the corresponding attribute of the material, for all parts of the object. The cemented interfaces keep their amber look.

• edges: draws the feature edges, i.e. the edges where the faces of an object meet at an angle of more than 30°, and the boundary of open surfaces such as a Detector. By default, the :cad look draws them for all materials except :mechanics, whose detailed meshes, e.g. a housing from an STL file, would cover the optics, the :modern look for the glass only. The parts of composite objects contribute edges according to their own class. edges = true or false overrides the look, for all parts of the object. Shapes rendered via the marching cubes fallback have no edges. The opacity of the edges follows the opacity of the object, e.g. a nearly transparent housing (color = (:gray70, 0.05)) gets correspondingly faint edges, while the edges of glass stay visible.

render!(ax, lens)                       # glass of the active look
render!(ax, mirror; edges = true)       # with feature edges in the :modern look
render!(ax, lens; color = :red)         # red glass, same transparency
render!(ax, mount; material = :mechanics, edges = false)

Lighting

The lighting of the scene is set via studio_lighting!: an ambient light plus a key light from the upper right front, a fill light from the left and a rim light from behind, all relative to the camera. Backends with a single directional light (e.g. CairoMakie) get the ambient and the key light only.

fig = Figure()
ax = LScene(fig[1, 1])
studio_lighting!(ax)
render!(ax, system)

It works for an LScene and an Axis3. studio_lighting!(ax; preset = :none) keeps the default lights of Makie.