How can I get Blender to generate Color Grids without the alpha-numeric references? I know the UV Grid generates without them, but I’m trying to get the specific color pattern of the Color Grids without the alpha-numeric references in the way.
I realize this might mean reworking as an add-on whatever code generates these, and although I’m particularly inept at that I’m willing to give it a shot if somebody can point me in the right direction.
I don’t think this is doable as an addon, I guess the pattern is hardcoded in source code of blender.
Making an addon that recreate this pattern and save it as an image is doable but it’s a lot of work.
You may better create your own pattern or grab another available on the web :
https://www.google.fr/search?q=uv+pattern+grid&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiExOOOoq_gAhVFxYUKHVuhBtoQ_AUIDigB&biw=1920&bih=953
Other patterns are available – I’m trying to get this specific color pattern. The code that generates this would have to be in Blender’s open-source code, so with any luck it’s possible to copy it into an add-on without the bit that adds the alpha-numeric references (an over-simplification, but still).
Much as I’d like a way to generate these, if that can’t be done then I’ll do my best to repaint generated ones by hand – that’ll be a pain, but for smaller grids it’s doable.
hum, sorry for my curiosity but why do you need that specific pattern ?
But yes you’re right, you can look for the source code of this an try to recreate it in another language.
Sound a bit complicated though even if it’s a simple pattern.
Maybe that’s also doable to get something similar with some procedural shading, with a buch of brick and checker patterns. It won’t be a 100% match but could be simpler …
I don’t need it, I want it. Aside from being pretty, it is (for a certain subset of 3D artists) iconic, and although yes it could be faked that’d probably look subtly off. I figured that because Blender generates these it could be feasible.
That having been said, what gave me the idea was I used the 256x256 one in the top post to check out the visible area of framed images in Two Point Hospital, and liked the look. Some work in GIMP and I got this:
Not perfect, but close enough for where it’s going.
this can easily be created procedurally and I can make the node setup adjustable so you can change how random you want the brightness of rows of colors to be and how transparent it should be to the checkerboard texture underneath tommorow I can create a node setup and upload it here
Exactly what I was looking for! And considering how long it’s been since I’ve worked with C++ (no, that’s C, isn’t it?), I can tell this is nicely commented (for some reason I thought this was gonna be in Python - still very informative, thanks).
.
Appreciate it, but unless that’ll do exactly what the code PyBlend linked to does (without the alpha-numeric references of course) it’s not what I’m looking for – if it did that’d be some impressive node-work though!
20241004_ColorTestGrid_004.blend (379.7 KB)
I was setting up a test scene in 4.3.0 beta, accidentally opened it in 4.2.2, and when rendered some of the alphanumeric indicators on the test grid didn’t appear! 
Reworked the scene to get an orthographic camera on a plane, in multiple attempts different blocks were empty. Even saving lossless not quite as clean as an actual saved Color Grid (the generated Color Grid had all the indicators, the glitch is only happening on some renders), but composited a couple of the renders in GIMP to get the above.
Would still like the option to generate a Color Grid without the alphanumeric indicators, though.
