Haven't had time to check this, but it does seem to good to be true http://www.cmyk2rgb.com/
Posting it just in case.will check it and get back if this actually works. On 10 February 2016 at 18:35, <pete...@skynet.be> wrote: > which is arguably more doable, as you might find blueprints – I did for my > own car. > > This is more like giving you artwork on which a bucket of paint has been > dropped. > It’s restoration. > if that’s your predicament and the client knowingly asks you to do this – > then sure, grade away! > > > *From:* Sebastien Sterling <sebastien.sterl...@gmail.com> > *Sent:* Wednesday, February 10, 2016 7:23 PM > *To:* softimage@listproc.autodesk.com > *Subject:* Re: Softimage and CMYK > > A very specific car, inside and out. :P > > On 10 February 2016 at 18:22, Sebastien Sterling < > sebastien.sterl...@gmail.com> wrote: > >> this feels like being asked to model a car with only the web as source of >> references :P >> >> On 10 February 2016 at 18:15, <pete...@skynet.be> wrote: >> >>> well there’s your answer then - >>> nothing much you can do on your end except document and liaise with >>> client. >>> >>> if the files are right’ and look wrong, chances are you are missing part >>> of the puzzle. LUT’s for instance. Perhaps there’s printer specific color >>> profiles used/baked in – perhaps they have source files that look right – >>> which would be a better starting point. >>> >>> messing about with sensitive stuff, such as changing colors on marketing >>> materials is something that should be undertaken only with consent from the >>> client. >>> as in: you’re saving their ass and they acknowledge this. otherwise this >>> will come back and bite you in the end. >>> >>> good luck! >>> >>> *From:* Sebastien Sterling <sebastien.sterl...@gmail.com> >>> *Sent:* Wednesday, February 10, 2016 2:46 PM >>> *To:* softimage@listproc.autodesk.com >>> *Subject:* Re: Softimage and CMYK >>> >>> The blacks are off on pretty much everything I've had to interact with >>> thus far. they are wrong from the start, they where sent to us wrong, they >>> look wrong in acrobat >>> >>> >>> >>> On 10 February 2016 at 13:40, <pete...@skynet.be> wrote: >>> >>>> >>>> > Sounds interesting thx Fab >>>> > Thanks Pete, they are in .PDF but there are no layers included as far >>>> as i can tell, >>>> > the files where intended for printing originaly. >>>> >>>> oh I see, and I assumed they were intended for making your life >>>> miserable? >>>> >>>> One can send layered files to print (it’s not necessarily bad >>>> practice), it was worth a shot. >>>> >>>> It’s not clear to me in your description if the files you received look >>>> right to you – eg. in Acrobat - are the blacks ‘off’ there as well? >>>> Or in other words, are you sure that things go wrong during your >>>> conversion? >>>> There is some voodoo involved in exporting pdf’s – so something might >>>> have gone wrong client’s side – or the print-ready files might simply not >>>> resemble the actual result: special blacks, laquers indeed, color >>>> separations, flattened transparencies, LUTs – who knows – could be nothing >>>> to do with CMYK>RGB. >>>> >>>> >>>> >>>> On 10 February 2016 at 11:59, Fabian Schnuer Gohde <list....@gohde.no> >>>> wrote: >>>> >>>>> Have a check if there are spot colors or laquer or similar layers in >>>>> the file. They can cause funny results. In the latest Acrobat Pro DC (part >>>>> of CC) under Tools>PrintProduction there is a color converter that might >>>>> help get this into the sRGB world. >>>>> >>>>> Best of luck, >>>>> Fabian >>>>> >>>>> On 10 February 2016 at 10:04, <pete...@skynet.be> wrote: >>>>> >>>>>> were they PDF’s? >>>>>> if the pdf is still layered, possibly there is a specific layer for >>>>>> creating those ultrablacks (if that is what’s going on) that you can turn >>>>>> off - in illustrator or indesign or such (not PS). >>>>>> Also, when there, and the files looks ‘normal’, you can simply try >>>>>> ‘export for web’ as a png or jpg. >>>>>> >>>>>> >>>>>> >>>>>> *From:* Sebastien Sterling <sebastien.sterl...@gmail.com> >>>>>> *Sent:* Tuesday, February 09, 2016 11:16 PM >>>>>> *To:* softimage@listproc.autodesk.com >>>>>> *Subject:* Re: Softimage and CMYK >>>>>> >>>>>> Could i approximate it ? in sRGB ? god but this is a mess :( >>>>>> >>>>>> I don't think the client has any original sRGB artwork >>>>>> >>>>>> On 9 February 2016 at 22:05, <pete...@skynet.be> wrote: >>>>>> >>>>>>> I don’t think it’s a colorspace problem perse – as within normal >>>>>>> ranges, going back and forth between RGB and CMYK isn’t so bad. >>>>>>> >>>>>>> The ultramarine blue in the blacks, might be something very >>>>>>> different: >>>>>>> a good print black is not 100% black and 0% C,M,Y each: this would >>>>>>> result in a dark grey. >>>>>>> So ‘designers’ add some of the other colors, up to almost 300% >>>>>>> total, to deepen and tint the black. >>>>>>> A cold deep black with lots of cyan, a warmer black with yellow >>>>>>> or... everyone has his preference for mixing black it seems, and they >>>>>>> even >>>>>>> give their blacks fancy names. >>>>>>> >>>>>>> Of course that’s bound to give you trouble going back to RGB – as >>>>>>> those are colors that are far outside the normal gamut of colors. >>>>>>> The other way around, we would call them illegal colors, our pure >>>>>>> 100% primary and secondary colors are among them. >>>>>>> As the others have pointed out, welcome to a world of pain – doing >>>>>>> some print work atm, having to mix and match 3D renders (linear), CMYK >>>>>>> artwork, photographs (srgb), physical parts painted with pantone colors >>>>>>> and >>>>>>> more, and going back and forth between 3D and ps/illustrator and pdf - >>>>>>> and >>>>>>> it is a minefield. >>>>>>> You have to inform your client that their artwork is purpose made >>>>>>> for a certain printing effect which makes them unfit for other use. >>>>>>> You might be better off scanning/photographing printed artwork or >>>>>>> physical products or ... >>>>>>> >>>>>>> >>>>>>> *From:* Sven Constable <sixsi_l...@imagefront.de> >>>>>>> *Sent:* Tuesday, February 09, 2016 10:38 PM >>>>>>> *To:* softimage@listproc.autodesk.com >>>>>>> *Subject:* RE: Softimage and CMYK >>>>>>> >>>>>>> >>>>>>> Even I don't get why black is ultramrine blue, I think it's not >>>>>>> because of CMYK vs RGB but the embedded color profile. I get pdfs for >>>>>>> print >>>>>>> all the time, sometimes I even send CMYK renderings back to them (of >>>>>>> course >>>>>>> not rendered in cmyk but converted in PS afterwards and with their color >>>>>>> profile attached). If converted from CMYK to RGB and vice versa I saw >>>>>>> only >>>>>>> minimal color shifting. It depends largely on color space and -profile. >>>>>>> Remember CMYK and RGB are color models, not color space nor color >>>>>>> profiles. >>>>>>> >>>>>>> >>>>>>> >>>>>>> If you import pdfs into PS, convert them to RGB and CMYK. If you see >>>>>>> significant color changes between both, it'because of the color profiles >>>>>>> that are assigned to CMYK and RGB inside Photoshop. I would just convert >>>>>>> them to RGB and then test different color profiles (Edit->Convert to >>>>>>> Profile). Tick 'Preview' and switch between the different profiles >>>>>>> available. Maybe one of it will crush the blacks. >>>>>>> >>>>>>> That is a bit awful and I agree with Rob, the client should send you >>>>>>> proper files. But it's difficult to say what is proper since 3D is not >>>>>>> print is not film is not reality. In an ideal world they would send you >>>>>>> RGB >>>>>>> files with sRGB color profile but I doubt this will ever happen. They >>>>>>> usually work with CMYK from start to finish. >>>>>>> >>>>>>> >>>>>>> >>>>>>> Are these product shots are meant for web or print? If print, >>>>>>> they're possibly correct with black beeing blueish and the client >>>>>>> expects >>>>>>> the renderings accordingly …? >>>>>>> >>>>>>> sven >>>>>>> >>>>>>> >>>>>>> >>>>>>> *From:* softimage-boun...@listproc.autodesk.com [mailto: >>>>>>> softimage-boun...@listproc.autodesk.com] *On Behalf Of *Sebastien >>>>>>> Sterling >>>>>>> *Sent:* Tuesday, February 09, 2016 8:30 PM >>>>>>> *To:* softimage@listproc.autodesk.com >>>>>>> *Subject:* Re: Softimage and CMYK >>>>>>> >>>>>>> >>>>>>> >>>>>>> Basically the client wants a pack shot of thirty or so products, so >>>>>>> we need to model them up and texture them. >>>>>>> >>>>>>> In order to texture them the client sent the original packaging >>>>>>> files in .pdf format, but these where originally destined for print and >>>>>>> so >>>>>>> they are CMYK. >>>>>>> >>>>>>> the colors are off, it is most noticeable in the blacks, as they >>>>>>> have all shifted to ultramarine blue. >>>>>>> >>>>>>> I don't know how to fix this, it is pretty baffling, :( >>>>>>> >>>>>>> >>>>>>> >>>>>>> On 9 February 2016 at 19:19, Rob Chapman <tekano....@gmail.com> >>>>>>> wrote: >>>>>>> >>>>>>> aah was part of the DTP revolution first time around with Aldus >>>>>>> products... So I remember a bit about conversion having to get renders >>>>>>> to >>>>>>> the printers sometimes and being very disappointed with the blue greys >>>>>>> :) >>>>>>> >>>>>>> >>>>>>> >>>>>>> firstly this may help >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> and may explain why the colors changed. some colors simply do not >>>>>>> fit between gamuts and will change regardless. >>>>>>> >>>>>>> >>>>>>> >>>>>>> so you have the CMYK plates and have to match in RGB to render and >>>>>>> then convert back to CMYK again? oof. have you tried regenerating in >>>>>>> photoshop from the separate CMYK and they match the printers provided >>>>>>> RGB >>>>>>> 0utput? >>>>>>> >>>>>>> >>>>>>> >>>>>>> Photoshop LAB color mode was invented for this no? better off >>>>>>> starting with something super wide gamut really depends on what the >>>>>>> printer >>>>>>> is using to convert to RGB with or originally sourced from and what >>>>>>> printer >>>>>>> profiles etc eg is it coated or glossy paper , all that palava. >>>>>>> >>>>>>> >>>>>>> >>>>>>> if its one specific pantone color or a few then you are in luck as >>>>>>> you can just render mattes like Mr Wuijster suggested and the >>>>>>> printer can easily spot color these. >>>>>>> >>>>>>> >>>>>>> >>>>>>> good luck matching anything RGB with a printer tho...! >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> On 9 February 2016 at 18:49, Rob Wuijster <r...@casema.nl> wrote: >>>>>>> >>>>>>> It's not possible, unless you have the exact profile for the printer >>>>>>> it was finalized for. >>>>>>> And it's weird that black is ultramarine blue in your files. >>>>>>> >>>>>>> Just have them give you RGB's, or give them a ton of mattes so they >>>>>>> can color correct the shit out of it again. >>>>>>> >>>>>>> That's what normally happens over here, as the Photoshop guys seem >>>>>>> to like that workflow ;-) >>>>>>> >>>>>>> Rob >>>>>>> >>>>>>> >>>>>>> >>>>>>> \/-------------\/----------------\/ >>>>>>> >>>>>>> On 9-2-2016 19:35, Sebastien Sterling wrote: >>>>>>> >>>>>>> Trouble is here what i hace is in CMYK from the printers and already >>>>>>> decolored, what should be black if ultramarine blue, am looking or a >>>>>>> way to >>>>>>> convert these images back to sRGB and back to what they should look >>>>>>> like. >>>>>>> there are lots of tutoriels on how to move from sRGB to CMYK but none >>>>>>> for >>>>>>> the reverse. or how to color correct it. >>>>>>> >>>>>>> >>>>>>> >>>>>>> On 9 February 2016 at 18:27, Sven Constable < >>>>>>> sixsi_l...@imagefront.de> wrote: >>>>>>> >>>>>>> CMYK generally is not very well suited for 3d because rendering >>>>>>> itself is RGB. When you convert textures in PS from CMYK to RGB I would >>>>>>> use >>>>>>> 'relative colormetric' (color settings->conversion options). >>>>>>> >>>>>>> >>>>>>> >>>>>>> sven >>>>>>> >>>>>>> >>>>>>> >>>>>>> *From:* softimage-boun...@listproc.autodesk.com [mailto: >>>>>>> softimage-boun...@listproc.autodesk.com] *On Behalf Of *Sebastien >>>>>>> Sterling >>>>>>> *Sent:* Tuesday, February 09, 2016 7:13 PM >>>>>>> *To:* softimage@listproc.autodesk.com >>>>>>> *Subject:* Softimage and CMYK >>>>>>> >>>>>>> >>>>>>> >>>>>>> Hey list, am working on a job with package assets art in CMYK. Soft >>>>>>> won't display them. >>>>>>> >>>>>>> Does softimage not support CMYK ? >>>>>>> >>>>>>> Also, when you move from srgb to CMYK in photoshop there is a color >>>>>>> shift. >>>>>>> >>>>>>> is it possible to reverse this process ? >>>>>>> >>>>>>> Sorry for weird noobie questions, am not accustom to working with >>>>>>> CMYK in production. >>>>>>> >>>>>>> is weird. >>>>>>> >>>>>>> >>>>>>> >>>>>>> Geen virus gevonden in dit bericht. >>>>>>> Gecontroleerd door AVG - www.avg.com >>>>>>> Versie: 2016.0.7357 / Virusdatabase: 4522/11592 - datum van >>>>>>> uitgifte: 02/09/16 >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> >> > >
