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 <https://3.bp.blogspot.com/-oHqXVmCfWno/Vpkyicb11xI/AAAAAAAAAJA/U3ZQhEJoDZM/s1600/colorspace%2Bcomparison.png> 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
