Render routput resolution

kyoto kid

...is there a way to change the resolution of the render output from 3Delight in Daz Studio? Apparently all the file formats, be it .jpg, .tif, or ,png render to a resolution of 96 dpi. I was conversing with someone on another forum who mentioned that this setting can be changed in Poser, and was surprised that it couldn't be done in Daz Studio.

Is there some kind of control that is "hidden" as I see nothing on the Render Settings pane.

Richard Haseltine

Actually they are not tagged with a PPI value - they will generally show as either 72PPI or 96PPI in viewers or editors, depending on what the default is, but that's an addition. Since you can't set the size in inches (or other physical units) there's really no need for a PPI setting. Annoyingly, the pixel dimension boxes aren't set up to accept simple sums (such as 8*300 to set a 300PPI image 8 inches wide) so the calculation, such as it is, has to be done elsewhere. Remember that a pixel is a pixel is a pixel - a 300PPI pixel is just the same as a 72 or 96 PPI pixel - so you can always resize without resampling (file size locked) if the PPI absolutely must be set.

kyoto kid

...so this would be done in a 2D application (like Gimp) instead? Does that actually improve the sharpness of the image?

A bit confused by all this as last night I was trying to submit a work to a gallery which had a maximum image size of 2,000 x 2,000 pixels but only a maximum file size of 950k. The image I was working on (final .jpg saved in Gimp) was over 1,600k at 96dpi at the image's original rendered size of 1500 x 1111, which either required serious rescaling of the image to a smaller size or compressing the image, both which compromise fine detail and quality.

Richard Haseltine

If the size is fixed, in pixels, then PPI has no significance. PPI matters only if you are setting the image size in inches or other real-worl units, when the combination of PPI and physical size determines the number of pixels, or if placing the image in an application that gives real-world sizes for its pages (a layout or illustration application for example) when PPI determines the scale. Your options for changing file size are changing the pixel size or the compression/file format.

kyoto kid

...so changing dpi output to a higher resolution would be more important if you are actually going to produce a physical print of the work then, correct?

Also, curious, what effect do the Pixel Filter and Pixel Samples settings in the Daz Studio render settings pane have on the final rendered image? Are these used to help reduce detail loss during .jpg compression?

Jaderail

No they are used for the In render anti aliasing. Say you render a figure on a Black background to later be layered into a image those settings determine the quality and size of how those edges will be dealt with. It also comes into play very much in Depth of Field renders. It has a great deal to do with grain in that case.

kyoto kid

...OK, so how does this relate to the basic render that one would upload to a particular site?

Richard Haseltine

It doesn't, other than getting the right values for the look you want at the speed you want - more samples if slower but may, depending on what you are rendering, give better quality.

pascal_van_uffelen

ppi, dpi etc. Well, how does your computer screen work? Your screen has dots. A red, green and a blue dot together give the illusion of a mixed colour dot. You can not change the amount of physical dots on your screen, or some one else's screen. They are hardware. That simply means you can not change the pixels per inch or dots per inch so setting these values in your image is useless. It is only there as a calculation help. It gives an indication about print quality in order that adding detail that isn't there, from a low pixel size image, to get to the dpi a printer uses, results in poorer image quality than down scaling details, from a higher pixel size image, that are there. But... Some websites embed images in pixel windows, some embed them in screen size percents and some embed them in true pixel size. If you post to a fixed pixel space that will be the detail you get and either you down-, or upscale, yourself, or the website does the job. If the window is in screen size percents you will get a pixel amount based on the screen size of the viewer, so you have no control at all. If a website allows for real PIXEL size viewing there will be, for example, an eye filling the whole screen on a low pixel screen, and a full scene image on a big pixel amount screen. Also consider view size. If you have a big 4K screen it won't have more pixels than a small 4K screen. It will only have LESS dpi. So at a close look a big screen has poorer image size. But as you will mostly look at an image at viewing distance, meaning you get to a distance where you have the best view, they will have the same assumed quality. And.. The same for printed dpi. changes you will climb a building to view their billboard up close are poor so it probably will be printed in lower dpi. In general, ppi and dpi are hardware, you can not change them. What you can do in image software is calculate the amount of pixels for display when you know the size of the display and the amount of pixels or dots per inch or what ever measuring unit. That calculates the amount of PIXELS or DOTs you need for best display.