V8 line quality still is ragged not smooth as V5

[Steve1]

Hi, V8
circle is not as such all way round but has rough areas, its making me think lines dont reach it.
In V5 a circle was a CAD item perfect all round.

I have lines coing up to it yet the mess denies me seeing if I have it as I wish.

Also an arc was deceiving me, until I opened it in V5 and then could see what I needed to see.

view this in photoshop ‘ACTUAL PIXELS’ SETTING’ as one needs to see how they ACTUALLY appear.

(cant find the arc yet did a screenshot..damn !)

I had hoped V8 had solved this, as it was main reason I went back to V5 from V7.
This is CAD after all.

Steve

[Helvetosaur]

This is what my default V8 looks like on my 4K screen at 150% display scaling:

(maybe with a lighter background to match yours)
NVidia RTX 4070 12Gb - 4x AA

[wim (Wim Dekeyser)]

Hi Steve -
As mentioned before, we have Rhino 8 curve drawing on the list as RH-78744 Display: Curve drawing quality
-wim

[Steve1]

Hi,
Gijs I seem to recall had found that altering gamma solved it.
I did that in V7 and it did, but the grid lines were then awful, I altered the colours of the grids and sorted that, but then when I went to ghosted view they were bad again, each viewmode was awful, so I went back to V5 …and stayed there ! someone said resolved somewhat but not perfect in V8, so then I get V8.

please note this in that set of comments the link takes me to.

Having just used V8 fresh from V5 its a shock to the system.

I was also told the new graphics cards are not as good at curves and lines anti aliasing.
however my new card a Geforce RTX 3070 is looking fine on V5, and poor on V8 , so its not the card !

Cheers

Steve

[Gijs (Gijs de Zwart)]

@Steve1

Gijs I seem to recall had found that altering gamma solved it.

well, solved, not really. It did affect AA for curves in a positive way, but also affected other parts of display that were less pleasant.

[Steve1]

Hi,
exactly, lines were great again, but OMG how it messed with other things.
V5 was a peach., and I can go straight into it right now and enjoy.

Steve

[CADARTZ]

i have these settings for rhino 8 if it helps, im guessing its AA affecting lines, its no v5 but to me its good enough

in v8

[Steve1]

Hi,
somewhere was a thread asking me to try V9 as it was same as 8.22
cant find it.
so using this thread, its appropriate..
Here I am reporting back on tests so far in V9.
NO BETTER. despite seeing mention of fixed ,

the blue dots are at visible dashes,…say no more !!!

all images that are screen grabs in rhino, to be viewed in pshop as top menu>View 100% or enter that in the % box bott left of the image.

V5 is a thin pure line, and see why that is, no steppy nature, AA far better.
I am running a Nvidia GeForce 3070 current card, so no saying its the fault of new cards, as V5 is being run on it as well.
In V7 Gijs said alter gamma solved it, it did but the grids were awful, a tail chase developed to solve the knock on effect, and result was awful

lines steppy, rough, projects to mesh have ants on fishing line look, despite it being said its been solved. V5 can do it.

If I have line thickness set for drawn lines different in V9, let me know, I did ask before doing this, but both layer palettes are set to default. and anyway why make default worse ?

Steve

[CADARTZ]

I knew i wasn’t going more nuts than I already am there is something very different with v5 and V8 quality lines by default

Unfortunately it does not get better than those settings for V8 if I missed something here I don’t know but works for me good enough

What monitor are you running? Maybe a higher resolution one can make it look better

[stevebaer]

Steve is showing super dense polylines in his images and that is what we are trying to figure out.

[Gijs (Gijs de Zwart)]

@Steve1 what’s the size and resolution of the monitor your are evaluating this on?

[Steve1]

Hi
£1400 worth of Eizo CG247 1920 x 1200.
I have had three Eizos since starting out with a PC, first in the days of Macromdia Freehand 5 and Photoshop 4 and win95 was a CRT. wow what a monitor, way better than the usual stuff they had in the office , sharp thin lines. Having gone from Rotring 0.1 pens it wasnt an uncomfortable experience.
Then at home I got my own PC and bought another Eizo CRT still have it in back room as some sims need CRT.
Then a new tower and a new monitor, went bigger with 24inch Eizo ,a flattie, CG241 I recall 1920x 1200. then at end of its lifespan bought this CG247.
One thing though, it or something is causing splits as I pan left/right in my cockpit frames in the flight sim, have always had that. and now with a 3070 and new monitor, and I wanted to be free of it so was advised by Eizo it will be ok, why ?

the little enlargement showing the steps versus the v5 smooth transitions is the cause.
and the ants , still to solve, a separate issue perhaps. so 8.22 if its in this WIP hasnt solved anything.

Steve

[Rhino_Bulgaria (Bobi)]

There is a hidden command that let’s you alter the wireframe thickness in Rhino. Note that it controls both, surface wires and curves in Rhino 7 (which is a good thing), but fails to control the line thickness in Rhino 8 (super wrong decision). At lest that was the case when I tested the command in Rhino 8 Evaluation.

Try this to improve jagged wire rendering in Rhino 8

There is a hidden command in Rhino called TestWireThicknessScale which basically lets you change the wire thickness of curves, surfaces, isocurves, SubD and meshes. I often read here that Rhino 8 users have troubles with the anti-aliasing of the wires. I found that setting a value of 1,5 makes the wires relatively smooth, albeit they become a bit thicker than before. There is also an option to make this command automatic upon starting Rhino. To do so, you have to include it into the list of com…

[CADARTZ]

Interesting i am using the same res 1920x1200 on an old Fujitsu screen

V8 had stuff changed under the hood also

[CADARTZ]

“Aliasing is more noticeable at lower resolutions or when viewing the image up close.”

I got this answer from a quick search and what helvetosaur showed from his 4K screen it could improve the situation but not solve it with higher res monitors

If I understand this right from the RH - 78744 list the line quality has been regressing since v7?

[Steve1]

Now in Pshop zoom in the top of the circle the same amount for V5 V7 V8 and do a screen grab (printScrn button to right of F12) and paste into new file and cut out the same small area and post, here. as I did for my comparison.
I bet there are no visible hard opaque few pixel long steps..
repeat for the lines if you wish.

It is purely down to the anti aliasing, nothing else.

Steve

[Steve1]

Hi Guys, and Gals.
Coming back to Rhino since before Christmas, October, as have been 100% on my website.
and 7 months since last suffering this line quality issue (Aug 2025).
Hope thats long enough for Mcneel to solve it !
Shall I launch V5 again, or try yet again to get comfortable with V8.
I have download the update , its rhino_en-us_8.29.26063.11001.exe
I have installed it, rebooted PC,
Before I launch it, has it now solved this line quality ?
Has RH-78744 been implemented/solved. ?
Reading this thread I indicate exactly the cause, my blue dots on visible steps, is it.

So might I be a Happy Chappy ?

Whats happening on the line quality issue, or am I better off in WIP 9, which by the way was supposed to have addressed the issue, but trying it, it hadnt, it was no better in fact.

I will be placing sections through an obj mesh, projecting a straight line to mesh, and dont want ants on the line, as was happening in V8, and V9. but not in V5.
Where are we on that now, as many moons have passed by now.

update…launch V8, circle not much better,
section line , ants still along it.
7 months and no fixes.
oh dear. what timescale is this fix likely to take ?

Just experienced this, a shallow line V8 thick and thin etc.
and same line in V5.
I really had hoped that 7 months later we were better for this now.

and marked

and line projected to mesh, ants along the line,
7 months on, still not fixed.
Very upsetting.

I ASK THE BIG QUESTION, IS IT IMPOSSIBLE TO FIX THIS, AND WHAT HAPPENED TO CAUSE IT ?
Come on McNeel , how long does it take , its basic fundamental stuff. its how we view lines.

Steve

[CADARTZ]

Maybe it’s a more deeper issue

[Steve1]

Hi,
I have just come back to use Rhino8 , and my first line I draw, and get thick thin.
OMG.so decide to try wip9 and custom buttons are lost.
so whilst awaiting trying to get those so I can start work, hoping line quality is now fixed, I have a file made in V8, do I export as V5 and start work, or give up or what ?

It really should be possible a few years on to have something as good as V5 by now.
Rhino line quality IS BROKEN, and no one has solved it yet, or have they ?

and export to V5 and draw line, even and smooth

why is V8 so bad, it would be great to move on but I find myself back with V5, but the file save time is 1m 20secs with a mesh and v8 20 secs, but I cannot stand ragged lines.
However I cannt stand waiting for 1m 20secs for a save each time . so really struggling what to do,
very disappointed Rhino is broken here.

that image of V5 doesnt do it justice, its a dead smooth even line,

is solidworks as bad as V8 ?

Is this a PRO CAD prog or what ?

Steve

[CADARTZ]

@Steve1

is solidworks as bad as V8 ?

Depends if you are on a laptop screen certain constraint icons can be to smal and what background you use, I do know one can change those settings in solidworks

In the end really depends what you need sw is good in its way and Rhino excels in another

My suggestion try it out

But honestly after my vitrectomy operation my vision has not been the best personally I’m very sensitive to light stuff now and certain colors feels like my eye is being hit with a sledgehammer

Ontop of metamorphosia due to fluids still trapped behind where everything is wavy and sort of a double vision so i can’t see a curve straight anymore

Now every line is crooked and horrible the great equaliser no matter the software.