// cmd: +a

#version 3.7;

global_settings
{
	assumed_gamma 1
}

background
{
	rgb 1
}
/*
light_source // not needed for this test scene
{
	-99*z, 1
	rotate <60,30,0>
}
*/

/* suggest smaller apertures if close to objects
yet far from focus; larger if distant objects */

// aperture and object scale, try 0.1 to 5 for example
#local Iris=1;

camera
{
	location <0,0,0> // zeroed to make testing simple
	look_at z // positive z direction, also simple
	focal_point <0,0,20> // focus here
	aperture Iris // higher value blurrier
	blur_samples 100 // higher better
	confidence 0.9 // higher better?
	variance 0.001 // lower better
}

// scene objects

#for (it,-3,3,3) // make 3 bars each

cylinder // near vertical bars
{
	-y*4*Iris,y*4*Iris,0.5*Iris
	pigment
	{
		rgb 0
	}
	translate <it,0,10>*Iris
}

cylinder // distant horizontal bars
{
	-x*50*Iris,x*50*Iris,5*Iris
	pigment
	{
		rgb 0
	}
	translate <0,it*10,100>*Iris
}

#end // for loop