tweak test

ReferenceTests/src/tests/examples3d.jl

@@ -643,8 +643,7 @@ end
     wireframe!(p[1][], fxaa = true, color = :cyan)
     r = range(-pi, pi, length = 101)
     surface!(-pi..pi, -pi..pi, [sin(-x - y) for x in r, y in r], transparency = false)
-    lines!([0, 0], [-2, 2], color = :red, fxaa = true, linewidth = 5)
-    scatter!(-2:0.2:2, zeros(21), color = :red)
+    scatter!(-1.4:0.1:2, 2:-0.1:-1.4, color = :red)
     p = heatmap!(-2..2, -2..2, [sin(x+y) for x in r, y in r], colormap = [:purple, :pink])
     translate!(p, 0, 0, -0.666)
     p = image!(-2..2, -2..2, [cos(x+y) for x in r, y in r], colormap = [:red, :orange])