Selection yellow hardly visible on edges of surface

jpg shows the problem, is there a setting that controls strength of selection colour at edges of surfaces ?



I really wish we could specify a width for selection width in the view modes, I’d love to be able to have a nice, fat line show up so I could tell what I’m selecting.

You certainly can.

Each named display working mode has controls for surface edge width. The edge color turns to the selection color when the surface is picked. There isn’t an independent width for when it’s selected. Tweaking the edge width, selection color, or background color settings can all be used to make a better contrast for your setup.

I get that, but you’re SOL if you want to have skinny edges so you can work effectively on a busy design, but still need to be able to see what you’re selecting.

I’m asking for an independent line width for selections.

this would be a nice feature. maybe its in the v6 wish list already @pascal @John_Brock ?


hanscad is exactly on the ball with that, to have selection indication independent of each display working mode or even within each but with an ability to have thicker selection lines. I would like one setting does all.

There are two things that currently are making rhino work very difficult…
I have had a hell of a job since day 1 V4 on seeing whats selected, I have to have a light background (its rgb 225 225 225) as I use PictureFrame to place plan drawings (which are rough, look like soot sprinkled over copier glass) into my workspace and I then make them 70% transparency so as to not have them kill my chance of seeing lines etc, and also so that I can see the grid through.

the pixel width lines are good for accuracy BUT the selection is also then pixel width and I have it as yellow. darker lines go lighter so not too bad but for every one time I can see the selection there is another where I cant. Even today a rich blue sweep with a selected curve on its edge had to be rotated until the yellow contrasted with it.

2)…what is hell on earth, the V5 layers bug. layers moving from where I placed them to bottom of palette, when i close rhino or when I nest them or when I close pallete, with 100 or more layers created in a structured way, its like someone opening your filing cabinet and switching all the files about not once but many times in a day. Flagged up and added to bug list July 2014 by Pascal I am truly gutted its not in the bug fix upgrade just released. It truly is doing me in :frowning:


As a work around, try moving the new layer up and down with the arrows right after you create it. In my brief tests, this stopped them from moving to the bottom.

Wow…6 months of hell solved :slight_smile: :slight_smile: :smile:
I owe you a drink.

let me know the cost and I shal paypal the money :slight_smile:


  1. create layer1, allocate object and save and close rhino, reopen and layer shot to bottom
  2. create layer2, allocate object and move layer up down one line with arrow tools, save, close reopen, its still there :smile:
  3. create ‘Mother3’ layer, then take layer1 and drag and drop inside it (child) , it immediately shoots to bottom.
  4. create ‘Mother4’ layer then take layer2 and drag drop inside it, it shoots to bottom.
  5. create ‘Mother5’ layer then move up/down 1 layer with arrow tools, drag drop into it layer1 and it stays put :slight_smile:

To avoid any layer moving from where you create it move it up/down with arrow tools, 1 up 1 down is enough it seems.

Until this is fixed you have saved the day !




Why is it that the lines in the middle of a simple surface, (such as that from PlaneThroughPt) are a bright visible yellow yet the edge lines are hardly discernible and much weaker ?
The centre lines are not any thicker. Using the suggested edge thickness and making it 2 also makes my item when not selected also thicker and as hanscad says, I dont want that, I need them thin as rest of my lines.

As I said since day 1 of rhino seeing selected objects is a real struggle at times.

I do hope that such a basic need is fixed in V6. hanscad suggestion for independent line width selections is the way.


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i have observed this since a while, but as i usually work on darker backgrounds didn’t find it so disturbing. I actually thought it is an openGL glitch to do with AA, but i just tried on a laptop with intel 3000 which shows this in standard wireframe mode for a surface object:

in numbers not much, but visually quite an impact if side by side.

just a few suggestions for the moment here:

-you could set the grid in display mode properties to “on top” or “transparent” to display it on top of your picture frame

-try inverting the drawings you have to trace so they are white on black so you can work on a darker background.

-adjust selection colour; I find around hue 322 fits light and dark backgrounds pretty good.

Hi, inverted drgs I have would be hell, they are atrocious as they are,
322 gives me magenta, is that what you have ?
I use red for specific purposes of cutting, and boolean shapes, magenta is too near my reds.

I just wish the edges were the same brightness of yellow as the cross on the surfaces,

why does edge get given a duller colour ? Does anyone know ?

I have just dabbled with white, even worse, and with all the other colours of the spectrum I use on drawings I revisit, any other colour will get very confusing.

Its a coding thing, but thats the end of that I guess, it is so darn difficult to see edges, basic stuff again.


Hi again,
Just why is the edge of a surface so much paler selection colour wise,.

here is a test, spot the surface edge when selected…

that faint yellow line to right of green you say…

NO !!!

look again !!!

really could do with a fix to this issue and as was suggested, have separate option control over selected items line width. dont want thicker normal edges, skinny as hanscad said.

Its the line to left of Cplane green one.

Truly not a good situation.

…and set to 2

I have had to unset 2 and use 1 after 10 secs as the finesse I need on this job and where I am at the moment task wise with it is killed.
I cant go dark background as my photos which are set translucent to show items behind as well as the grid wouldnt show, grid over all would hide my lines and many things when working zoomed out, crummy rough plans wouldnt show at all and inverting their colour would make their readability unusable. Also a dark background will mean the hundreds of colours I have in use designed to show up on a light background would see many unusable.

All in all messing up what I am happy with for the sake of this selection issue.

Fundamental stuff, almost top of fundamental list in fact.


While I agree it would be nice to be able to control thickness of selected curves, it is beyond me why one would set the layer color for objects to be anything close to the selection color.



…eh ??
I avoid any layer colour lighter than rich orange through to bright green.
Not sure what you refer to here.

I never have any layer colours set to yellow or anything similar.

As such its not responsible for such pale selection colour.


So where’s the problem then?
Or do you set object colour to yellow, which would lead to the same exact perplexity.


Steve, what is that ‘faint yellow line to right of green’ as you yourself put it?

the problem is a surface when selected seen edge on is virtually invisible, its that oh so faint tinge of yellow LEFT of the green axis line.
Bad isnt it.
The slightly more visible pale yellow line to RIGHT of the green is a line, drawn with line tool, when selected.

I never use yellow as a layer colour or anything near to yellow. Else one cant tell what is selected and what isnt.

No object is ever set to yellow or any similar colour.


You could also make more contrast in the color by choosing a slightly darker gray for the viewport background.

but it would mean the grid lines have to go a bit darker, and my crappy plans would show up less.

I have tried that, its darker than when I first started in Rhino, but it needs a notable darkening up to start working, then other shades I have start to lose out, my translucent pics start to suffer, as do the translucent plans.

I just need the edges to have same glow as lines and curves do, just dont know why Rhino wants to use a far duller desaturated yellow on surface edges.