One of the craziest things I ever noticed was when studying the bias(U, V), the pattern is completely symmetrical about the diagonal. I looked more deeply at the math and found you can swap the inputs and get the same results:

a ** (log(b) / log(.5))

(e ** log(a)) ** (log(b) / log(.5))

e ** (log(a) * log(b) / log(.5))

e ** (log(b) * log(a) / log(.5))

(e ** log(b)) ** (log(a) / log(.5))

b ** (log(a) / log(.5))

All of these expressions have the same value.

I used "log" above but I really meant "ln". Depends on whether you're an engineer or scientist or mathematician. 

I never saw the 2nd input to log do anything. I'm in Poser 12 and lower. What did you observe?

I never found any Poser docs for the math behind any of the nodes. I reverse engineered everything.

Your bias is correct. You can actually verify this by hand, building a ** (log(b) / log(.5)) in nodes and then take THAT node, subtract with an actual math:bias node having the same inputs, then take the absolute value of that difference and multiply by 1000 and plug that into ambient_color. If there's any deviation it will show up as not black. Here I used U and V as my two inputs, and the lower four nodes do the explicit math. The upper two compare and amplify differences from the real Bias function.

You seem to be talking about folders. I was asking about menu items. 

My worry is there's an addon in a runtime folder you have not realized exists.

So better to verify what addons were loaded by looking in the Window -> Addons menu.

From the main menu

Window->Addons->

What shows up in the flyout? I only have "Python Shell". Supposedly all addons show up there.

Just thinking out loud here - reviewing assumptions.

You've manually removed the line from pz3 files. Something is adding them back. My assumption is that only snarly's python code would make data with that name. But you assert that subdivider is "no longer installed anywhere that I can find".

Is it correct to assume ONLY subdivider makes that data or could it possibly be that snarly made a common library and accidentally adds that data to the scene no matter what app you're using from him. Do you still have other apps by snarly in a runtime? You don't even have to use them - if they're there they will run their init code.

And - just to cover all the bases - are you absolutely sure the subdivider is not installed anywhere, in any loaded runtime? Because if it is, well there's the problem.

Another possibility - you did run the snarlygribbly addon one time, and it prepared its data. You then made that scene your "default" empty scene and you've been reloading it every day for years, and every scene you create starts with that addon data already loaded. No need for any script to be executed anymore.

Poser offered this new ability to incorporate automatically attached info into a scene quite a while back. 

(... coming out of lurk mode ...)

No. In fact I found a thread from 2006 where anxcon wrote "wish they wouldve added arctan though :("

I'm almost positive I posted some very efficient matmatic scripts (using series expansions with some personal tweaks) for arcsin and arctan but they were lost with the closure of RDNA.

(... returns to lurk mode ...)

In case the link doesn't work:

I wrote about this years ago. If you have a single layer polygon, then it represents the boundary between air (on the camera side) and glass (on the inside). The shader you made is going to treat the entire interior volume of the shower as a glass box.

As others said, if you're going to use any "simple" glass shader, then the IOR has to control both reflections and refractions and the only way you will avoid the massive refractive distortion is to have TWO parallel surfaces, such that the volume of "glass" is very thin. The combined enter/exit refraction of thin plates of glass is just a tiny shift in the light path. The shift through a glass box towards the interior is not tiny at all but enormous.

The other approach that doesn't require geometry changes is to use a shader that handles reflection and refraction (or transparency) separately. Then you can fake the absence of refraction quite easily.

A good example is here:

https://community.hivewire3d.com/threads/good-glass-material-for-poser.4084/

Note that if you save your image to PNG format, it might make the background invisible. If that happens and you don't know how to change that, come back.

At the bottom-right corner of the preview window, click the second color picker and choose whatever "lit" color you want. Turn off all lights and remove/hide glowing objects.

lol 2024

You grab the parameter from the actor and then you can use Value() or SetValue() to read and write it.

It's a "feature".

https://projects.blender.org/blender/blender/issues/96475

Yet another example of programmer arrogance.