COLOURS - matching and using RGB
-
I'm trying to use photoshop to best get colour values into sketchup for a render using podium.
process - find a colour i want on my pantone colour chart, find it in PS, find the RGB values then copy these to sketchup RGB boxes.
so i think I have my colour in sketchup that is the one on my colour chart. when i use the eyeglass which is on my colour palette on this new colour the colour values change!
Whats happening? whats magnifying glass/eyeglass sampling to give a different result? shouldn't it be the same value as PS?
Also is there any colour management plugins or tutorials out there i could look at, the way sketchup sorts colours seem haphazard
cheers
c -
also when i eye drop on a colour, in the sketchup window, sometime it doesn't recognise that colour by putting a square round it in the colour pallette. do i have two the same?
I'm naming my colours - does this have something to do with it?
c -
cmeed, Don't know if there is much value in doing this. What you see on a display monitor, has little relationship to a pantone color chip in sunlight. If it helps, go here and scroll down for SU's standard colors.
-
honoluludesktop - agreed. I understand that colour is very difficult to represent faithfully.
But having a starting place such as a physical pantone colour formula chart and being able to show someone that their TV show set will look like this - is a good starting point
c -
There are a LOT of things going on there that will throw off your color. If you pick a color in PS and want it to show up as that color in SU, it's nearly impossible because of SU's shading. By default it lightens and darkens everything based on your point of view. If you're able to get one plane perfect the rest will be off, and the second you move, even that first plane will be off. If you check Use Sun for Shading, you'll at least get consistency. However, then you'll have to adjust the Light/Dark sliders in the Shadow Settings dialog. If, via that method you can get the accurate color, more power to you. Once you render it, you'll get similar problems.
The issue isn't necessarily the quality of SU though. It maybe your expectations. If you took a photo of something with that paint on it, would you expect to be able to go into PS and select a sample that's the same color as the paint? There will be color variation based on shadow, shade, specularity, light temperature, white balance, etc. Some of those things will come into play in SU, and the rest will show up in Podium. If it were otherwise, you'd end up with a very stylized representation of your object without shade or definition. You can still achieve that if you wish by exporting a SU image and then using that to make selections in PS and fill in with your color of choice. That's about the only way to be 100% sure that it's the color you want. And even then you have to worry about monitor/printer calibration.
-Brodie
-
Thank you Brodie,
yes you are right sketchup will shade faces resulting in darker areas.
What i want to know then is when i have found the rgb values i want, sketchup is using those values!
see pic (i'm not using the eyedropper as you may have thought)I realise that theres a myriad of thing effecting the colour of these faces, i want to be able to say that these are roughly what you get under these conditions. the conditions being set in podium - ie a simple light rig even white light disribution - no moody stuff
-
I see. I'm unfamiliar with that dialog. It seems to look very different on Mac than the windows version.
In Windows there are two eyedropper. one (with the box underneath) samples the color of the object, which is what you would want. It will replicate the exact RGB's that were entered. The other (with a monitor underneath it) samples a screen color, which sounds more like what you're describing. It samples the color on the screen which is always a bit off due to the shading.
Your 'eyeglass' I'm guessing is like my eyedropper, unless I'm misunderstanding. Perhaps there's an option somewhere to switch it from sampling the screen color to the object color?
-Brodie
-
The sense I have is that you are dealing with what Brodie says, you just don't realize it. The values SU gives are adjusted by where you place the spyglass.
I've run into this when filling in color on a model I've edited. I pick up a sample from a plane and drop it on the adjacent one. The color is noticably different. I assume that's because what's sampled has shading or tinting in it and when it's placed, even in the same plane, the shading is added again.
I don't know the mechanics of this but that's how it acts.
Best,
Jim
-
I do not know where exactly this should go on a Mac but extract it to wherever you keep your materials folder. It was shared somewhere here I believe but I forget whom to give the credits.
-
aaahhhhh! its becoming clearer.
so does the eye dropper with the box act the same as the one from inside sketchup. I have that it would make sense that they're the same but in different places.
Thank you Gaieus for that! i will have a play tomorrow morning and see where it goes
cheers
c -
I'm not quite sure I understand the question but the one with the box samples the actual values SU is using whereas the monitor one samples whatever pixel color happens to be on your screen at the time.
-brodie
Advertisement