Standard graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 4060 Ti (NVidia) Memory: 16GB, Driver date: 7-12-2023 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 536.67
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port 0
OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)
Anti-alias mode: 8x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High
Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 7-12-2023
Driver Version: 31.0.15.3667
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 16380 MB
You could try to increase curve width to 2 px to see if that makes it better on yours sytem.
I’ve also put this issue on the list as RH-78744 Display: Curve drawing quality
-wim
I went from V5 where curves are as one would expect in a high end CAD prog, no jaggies, just as if they were drawn on acetate with a rotring pen, well almost !
V7 and they were like twisted ribbons, so back to V5 I go., money wasted.
I am told V8 solves the problem to a fair degree. Its due to modern graphics cards and how rhino works with them I am told for V7.
Well I have a GTX3070 very current card, cost a fortune, and V5 is fine with it.
so if V8 has issues and bad twisted ribbons, and thats awful looking curves there, and this is just being added to a fix it list, thats extremely worrying.
I have just purchased V8 before the deal ended in feb 2023.
I hope my lines are not like that !
That simply shouldnt be , is Rhino going backwards , evolving back to a dinosaur ?
Its the first thing to get right, how the lines look, then start adding in commands etc.
Mcneel had a fix for V7…search these threads for it, gamma 2.2, fixed the lines twisted ribbon effect but messed up the grid colours so again back to V5 I go !
I do feel we made some improvements in this area in V8 though
that has given me hope, and I have bought V8 as I cant stay with V5 forever and V7 lines were awful.
There was also definitely some mention of a fix offered by McNeel involving altering gamma ro 2.2, as I tried it, and it worked, but messed up all the grid line colours, I then adjusted those and got a working environment again, until I went to ghosted mode, and it was ruined. so back to V5 I went.
I will see if I can find that gamma fix someone posted, is there scope in that which McNeel can persue to solve this ?
Gijs De Zwart
it’s still a bit of a workaround though, because it does affect lots of color settings. For example the grid looks really weird with this setting. I hope @stevebaer and @jeff can take note of the fact that gamma 2.2 seems to ‘fix’ display quality to level of V5 on Windows, as it could be a clue that these AA issues have been present ever since there are gamma settings in Rhino.
I dont want to find I have to remain on V5 as the most basic of things, line quality, is lost .
How have other CAD progs fared ? surely us CAD’ers all want lines without twisted ribbon effects. There would be uproar if new GPU’s messed up our beloved CAD progs ?
I am with a latest Nvidia and yet V5 is fine, so whats all this about new cards mess up lines, what is being said is new cards with new rhino is the issue, whilst new cards with old Rhino is fine.
Hi, @Pete_Brown
Pete Brown, can you post the file that you used for that illustration. ?
I am interested to see how that looks in V5.
Clearly V8 is better than V7 in wireframe/shaded mode, there is hope there for me.
Also in the next view it is worse.
@PowerShape
Can you post the file used for your illustration, wish to see how that is in V5.
, sure its better than that.
Its one reason I carry on with V5 , the line twisted ribbon effect, just unnacceptable to CAD users.
Hoping V8 has solved it.
@gaetan
but then we see Gaetan, and V8 is worse for that grid.
and the FIX is still ‘OPEN.’
Can you post the file you used for that ? see what V5 does with it.
basic stuff , visuals should be as good as V5 and other CAD progs.
Come on McNeel, catch up please.
, but messed up all the grid line colours, I then adjusted those and got a working environment again, until I went to ghosted mode, and it was ruined. 
so back to V5 I went.