Output pixel dimensions

[Tucker]

I noticed that in Revit 2009 they removed the ability to manually change the DPI and pixel dimensions of a rendered image. Does anyone know how to do this?

A few other comments: In previous versions I used to render a 3000 pixel wide image at 300 dpi in about 20 minutes. Now in 2009 the highest quality image is only 900 pixels wide for the same size viewport and takes an hour to render. Is the increased raytracing quality the cause of this or am I doing something wrong?

Thanks

[patricks]

The number of pixels of the rendered image depends upon both the selected DPI, and also the size of the viewport crop region.

If you got an image 3000 pixels wide at 300 dpi, then the viewport must have been 10" wide. Click on the view's crop region, and you'll see a button at the top where you can change the size of the view (without changing the actual camera position or angle). When you first create a perspective camera view, the default viewport size is 6" x 4.5" I think. So you click that button, and you can change it while maintaining the view's aspect ratio.

[SkiSouth]

You can directly set the DPI and size by using the plot setup vs screen. Do not recommend it unless you must have a very high resolution image, and you have PLENTY of time- talking days here.

[Chirag Mistry]

Yes you can !

For Size:
Select the crop region of the view and the size appears on the option bar, click it to change .

For DPI:

In the render dialog box select Custom (view specific) under the quality category, then select Printer under output setting and just type in the DPI value in the pull down

[LRaiz]

Back in the days of Accurender the DPI parameter was a bit confusing and I suspect the info below applies to a new renderer as well.

It is not really a printer DPI (which is defined by hardware). DPI in a render dialog refers to density of rays computed during rendering process. I'd call it raytracing DPI. Once rendering is computed raytracing pixels are used to interpolate physical pixels of a screen or a printer.

[iru69]

I think what people are after is getting the pixel dimension bigger so that when it prints, it looks nice and sharp. Using the "Output Printer Resolution" does that.

But, what you are saying is that along with simply making the pixel dimensions bigger, it's also increasing the density of the rays? Maybe that would help explain why increasing the dpi settings appears to increase rendering times so much?

It is not really a printer DPI (which is defined by hardware). DPI in a render dialog refers to density of rays computed during rendering process. I'd call it raytracing DPI. Once rendering is computed raytracing pixels are used to interpolate physical pixels of a screen or a printer.

[patricks]

hmm well all I know is that a 3D scene with crop region set to 6" wide and DPI set to 150 is going to yield an image that is 6*150 or 900 pixels wide. If I change it to 300 DPI, the size of the resulting image doubles to 1800 pixels wide.

[aaronrumple]

...resulting image doubles to 1800 pixels wide.

...which is quadruple file size and quadruple rendering time. Not just double.

[patricks]

yea I know, 4 times the area. I meant the width in pixels doubles if you double the DPI setting.