As you can see in the picture, the farther away from the glass,

How do you make glass that has a blurring effect?

I'm using Poser 11.

Thank you for your answers.

Firefly or Superfly?

I use Superfly.

The image you provided is a painting or a render from another app?

It's a photo.

I think they wanted a frosted glass opacity.  Don't have my computer anymore. I think our guru. Bagginsbill had a mat for it. SuperFly or Firefly or both. Been a long time since I have seen it

Try frosted glass.

Maybe add a turbulence somewhere to break up surface pattern.

Yep, that's pretty much what I came up with.

Thank you for your answers.
I'll keep that in mind.

As you can see in the picture, the farther away from the glass,

How do you make glass that has a blurring effect?

I'm using Poser 11.

Thank you for your answers.

I would suggest that you watch this 10 min video, as it will give you a good understanding of how each map works and what each setting is used for when it comes to PBR or Superfly. It applies to all normal materials. And its actually very easy, but it is some very useful knowledge to have in the back of your head whenever you work with materials and will help you be able to sort of analyze them and know what you are after and what you need to change to get the effect you are after.

PBR - Quick explanation

you guys are going to make your computers work too hard to render simple window glass. when I look through a window there isn't much refraction going on because the glass is not really that thick. Refraction is going to really increase you render time AND render noise. Just use glossy and transparent nodes for your glass. Roughness is the parameter that will make it look frosted. I'll post some examples but here is some simple glass used on the car windows. Renders fast and I can't tell that it's not "correct" with refraction.

Sure, I have to agree with you, if the mesh thickness is negligible then it makes no sense to construct a complicated shader with all the bells and whistles.  The more complicated the shader, the chances that noise will become a huge factor in the final render.

Hot chicks and hot wheels!

Dunno, I just stole the shader off a blender freebie, half assed translated it to Poser and did a 5 minute render. Makes sense though ghostship... and yes roughness seems to be the key. 

This is what I came up with. It's three layers. One layer gives you the glossy reflection and the other two create  the frosted side so you get blur and shadow on the glass. It will look radically different  depending on your light source. Should look good with your camera in a dark room looking out through the glass into a lit room as in the OP example.

Looks good. Filed.

Thanks ghostship2

Welcome!