Can I set DPI in my rendering?

can i get my rendering to 150-300 pdi, full size ? *I want to make a 7' sign at 150 DPI)

notes all seems to be 96 pdi?

thanks

Replies to This Discussion

Permalink Reply by Render Plus on April 4, 2012 at 1:39pm

You can set the resolution you want, for instance a 7' sign at 150 DPI would be 12,600 pixels wide.

(You will need lots of time and lots of RAM to create an image at this resolution.)

How we not set a DPI setting inside of thee JPG file itself. to set DPI in the JPG you have to load it into another program, like Photoshop and set the DPI.

Note: Setting the DPI does not change the actual resolution of the image - which will be 12,600 x something - it is just a setting some paint programs like to use

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Permalink Reply by Render Plus on April 4, 2012 at 3:22pm

i have 4 g of ram
i set 12,000 i'm sitting at the raytracing for a 1 hour ? w/ nothing?
should i wait?

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Permalink Reply by Render Plus on April 4, 2012 at 3:24pm

A 12,000 x 6,000 pixel image is very large and you may want to use a lower resolution.

Do your rendering first at 1,000 pixels to see how long it takes- if you are rendering at 12,000 x 6,000 then even with enough RAM it will take 144 times as long to render at 12,000 x 6,000 than at 1,000 x 500.

Also, check the RAM usage in Windows Task Manager. If you are swapping or running out of RAM, , than it will take a 64-bit machine with more RAM to process that large of an image.

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Permalink Reply by JEFF BOND on April 4, 2012 at 4:41pm

i have 64

more passes better resolution? more pdi?

thanks

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Permalink Reply by JEFF BOND on April 4, 2012 at 4:50pm

JEFF BOND said:

i have 64

more passes better resolution? more pdi?

thanks

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Permalink Reply by Render Plus on April 4, 2012 at 5:47pm

More passes make a better rendering - not higher resolution - but better quality at the resolution you choose.

Again you may want to test with a smaller resolution first to determine how many passes you want.

64 bit will let you use more RAM - but if you can cheaply add 4GB or more, you should do it for a large rendering.

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Permalink Reply by Jayne Leighty on April 5, 2012 at 4:05pm

How do you set the dpi? I cannot find the setting and my renderings are coming out at 72 which does not work for the project I am working on. Thanks!

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Permalink Reply by Render Plus on April 5, 2012 at 4:23pm

I am sorry, but there us no way to set DPI in IRender nXt. If you are using an rendered image where DPI is important to some other application, you will have to load the image into a program, such as PhotoShop which can set DPI, and change the DPI and resave it. You can change the DPI without changing the actual pixel resolution of the image.

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Permalink Reply by Render Plus on April 5, 2012 at 4:35pm

My renderings are really nice and I am quite happy with them, but they are rendering at 72 dpi. In Photoshop, when I copy and paste into a new document, the renderings shrink down to about 2" x 3" and when I enlarge they are incredibly blurry. The original renderings are so crisp and clear, but no matter what I do, I can not keep that resolution or quality when I copy them into other documents. I feel like I have tried just about everything and am at the end of my rope. I don't see a setting in iRendernxt to change dpi - is that even an option? The conversations in the forums are asking much more specific questions and I am not following.

In the rendering setup, where we can choose, sm/med/lg - there are numbers - is that the pixel size you refer to in the forums? How can this help me? I use 50 passes on the renderings - is more necessary? Like I said the quality of the rendering looks so nice until I take it into photoshop and try to manipulate it.

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Permalink Reply by Render Plus on April 5, 2012 at 4:37pm

How large do you want the image to be in Photoshop?

For example, if you are creating a 10" image at 150 DPI, you will need to render it to a customs sizex or 1,500 pixels wide. If you are trying to create something larger, you will need to render it to a larger size.

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Permalink Reply by Render Plus on April 5, 2012 at 4:40pm

I(f it is just DPI which is the problem, load the original image into Photoshop, change the DPI, but not the resolution, and resave it. Then you should be able to copy and paste in properly.

But, again, you need to decide what pixel resolution will need for your photo shop image and make sure that you render to that resolution.

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Permalink Reply by Rich Hart on April 5, 2012 at 7:11pm

I can set the dpi right here in my version of PhotoShop, but it's a few years old:

What kind of document, what application, do you paste them into?

By the way, when we looked into setting the dpi for the image when we save it, we found that it was in different places in the image file for different applications, there is not one standard setting, so we decided to just let you do it in the target application.