Pixels per inch doesn't affect anything at all. It's a number stored in the image so that if you simply drag it onto a printer icon, it prints at a known size.

To control Jaggies you use the Pixel Samples setting in render settings, and also you can tweak how it will combine samples with the post filter options.

For real smooth edges, try Pixel Samples = 6, and use a Sinc post filter, size = 3.

As for your slow/dead renderer, you probably want to learn to optimize the render settings a bit.

I assume you were just using the standard render settings dialog, not the advanced one provided by Dimension3D? All of us who are serious about control use D3D's Render Firefly dialog. It's in menu Scripts/Partners/Dimension3D/Render Firefly.

One problem with the Python API that it relies on is that enabling IDL doesn't work. You first have to turn on IDL in the normal render settings dialog. Then you can tweak with the D3D dialog.

On the left side of the D3d dialog, try setting:

Bucket Size=16
Number of Threads=2
Pixel Samples=6
Shading Rate = 1

On the right side of the D3D dialog, try these settings:

Enable Raytracing: yes
first Bounces = 1
first Irradiance Cache = doesn't matter  - has no effect with IDL - this is for AO
Irradiance Sample Size = 10
Intensity = 1
second Bounces=4
Samples=200
second Irradiance Cache = 30

• Filter -
  Sinc 3

Let us know with these settings - does it go faster? Does it finish?

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)