Blender DPI settings (Pixel size calculator)

[Alltaken]

its choosing the resolution based on the size/detail on paper.

Alltaken

[Briggs]

@Alltaken

Basse kindly created this DPI calculator in python.

just save the following text as a .py file and put it into blenders script path.

thanks basse, sorry for the delay in posting it, its been on ym Todo list for ages.
Alltaken

Unfortunatley this is rather too clunky for my tastes and not really a long term solution regardless. Nice to have though.

Cheers
Xarf

[JD-multi]

It’s really handy, else you have to type pixels size in a paint program, and change later on the dpi to see how small it becomes and start tweaking it like you can do in photoshop.

It would be a time saver as well as a cool feature to render you renders good enough for making a cool wallpaper, print on your nice printer on photo paper as well for companies that might use it for render high quality renders.
And especially companies look around for those nice features that might save a few minutes, and time it money
Especially what Ton said: “We want to gain blender more fame on the production side to get companies intrested”

Right now you have something that can help this a little. Personally I would add this features, and saying not adding it ebcause it makes bugs, that’s bullshit because you only have to make a math formula to caculate as example: 1024x768 pixels into a 300dpi render.

[cara-rj]

I find it really simple to use and quite useful!
Thanks a lot for the script.

[afecelis]

Hi Guys,

Please excuse me for bumping into such an old thread, but does anyone know if this script works the latest 2.45-2.46 version? Or has anyone updated it?

I find it to be extremely useful.

regards,
ALvaro

EDITED: I just tested it and it still is compatible with he latest versions. The error I was getting was because I hadn’t created a camera. Yet, I don’t get the nice UI from the 1st screenshot, all I get is a wizard asking for Units, DPI and X-Y size. But it seems to work fine, very handy!

[cekuhnen]

Any new revisions of this render feature?

My students ask me quite often about it.

ops
now I saw how old it is Dec 05 ??? ah hu …
Is that right?

[oblenob]

WOW. I am suprised I didnt find this. I had been looking for something like this for a while and then saw the thread on the main page I am happy

[Postmodern_Boy]

I’m glad this topic got dug up because I always wondered why blender didn’t have something like this already built in. Thanks to the person who wrote the script and thanks to the person who bumped this topic. That script really needs to go in some sort of archive of scripts so people can find it easier, or maybe even be included.

[cekuhnen]

I agree about the Script solution - should come with the Blender compilation.

[Alltaken]

Wow I remember this stuff… still a feature I would love.

Interesting old bump (if i do say so myself). Its funny how modern the tuhopuu interface still looks.

[cekuhnen]

It is really that old? Did I reply 2005??? Seriously ?

Wow where was the time …

[thelowlander (MadeByMichiel)]

Hey i could have a use for this as well!
Could save me a couple of minutes calculating how large I should render stuff out.

[charliemcf]

cekuhnen
no you didnt bump this,
afecelis
Member bumped this

look at the dates

and good bump tbh

[_peter]

Wow, excellent, ancient bump! This script is very useful.

[Harry_Beaver]

just found out too thx to another member.

extremely usefull !!!

[cekuhnen]

I am not saying I bumped it - I just thought that I repiled to this thread
some month ago and not 2005.

[PGT2 (Peter Boos)]

@Alltaken

#!BPY “”" Name: ‘DPI calculator’ Blender: 239 Group: ‘Help’ Tooltip: ‘calculate dpi thingys’ “”" import Blender from Blender import * from Blender.Scene import Render units = [‘cm’, ‘mm’, ‘inches’] factors = [2.54, 25.4, 1] scn = Scene.GetCurrent() rdr = scn.getRenderingContext() #factors = {‘cm’: 2.54, ‘mm’: 25.4, ‘inches’: 1} def main(): unit = Draw.PupMenu(‘unit %t|cm|mm|inch’) if unit == -1: return dpi = Draw.PupIntInput('dpi: ', 300, 72, 600) if dpi == None: return sizeX = Draw.PupIntInput('sizeX (in ‘+units[unit-1]+’): ', 10, 0, 10000) if sizeX == None: return sizeY = Draw.PupIntInput(‘sizeY (in ‘+units[unit-1]+’): ‘, 10, 0, 10000) if sizeY == None: return confirm = Draw.PupMenu(‘ok? %t|unit: ‘+units[unit-1]+’|’+str(dpi)+’ dpi|x: ‘+str(sizeX)+’|y: ‘+str(sizeY)+’|------|convert!’) if confirm != -1: rdr.imageSizeX(int((sizeX / factors[unit-1] ) * dpi)) rdr.imageSizeY(int((sizeY / factors[unit-1] ) * dpi)) main()

I hope this to be included in blender 3.0
No seriously in days where people print and 3d print, tools like this should be included, besides STL sizes should match world seizes and measureit seizes…

[RickyBlender]

there is an addon to help size of printed matter

it is good and easy to use for whatever paper size you have
archi or std engineer dwg or metric ones

and it will help set the dpi for given paper size

only thing is the scale thing
that is a bit more difficult to do

happy bl

[Herbert123]

@PGT2

I hope this to be included in blender 3.0

Uhmmm… That is a script from ancient times (pre Blender 2.5). Did you try to run this in 2.49? I did: it’s terribly outdated, and the user interface something straight out of the stone age.

A modern up-to-date add-on to calculate paper size and PPI and convert these into the required pixel resolution is already part of the standard add-ons shipped with Blender.

In the add-on preferences, turn on “Testing”, and search for the Render to Print add-on. Then activate it.
This will add the wanted functionality to the render options.

Not only does this add-on support PPI/paper size calculation fields, but it also includes many paper presets.

Don’t expect this to save the PPI parameter in the actual files, though. You will have to open the images in an image editor or viewer which supports changing the PPI of the image without resampling.

[PGT2 (Peter Boos)]

thanks for the update !