Grease Pencil fill areas look divided by multiples ray lines #43149
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Reference: blender/blender#43149
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System Information:
Windows 7 64bit (SP 1) - NVIDIA GeForce GTX 560
Blender Version
Broken: 2.73 release candidate
273fa0awith NVIDIA GeForce GTX 560Worked: 2.73 release candidate
273fa0awith INTEL HD Graphics 4000Short description of error
Grease Pencil fill areas look divided by multiples ray lines
I've tested on two computers and only looks weird on the one that use NVIDIA GeForce GTX 560
Exact steps for others to reproduce the error
Draw with grease pencil and set color fill to 1.0 with a light color to better see the problem
GP_BUG_fill_area.blend
Changed status to: 'Open'
Added subscriber: @mendio
Added subscriber: @Blendify
Can you post a good and bad picture?
Added subscriber: @JulianEisel
Cannot recreate that here using a GTX570 (Linux 64bit). First guess would be outdated graphics drivers. Can you check if you use this one ?
I've updated NVIDIA drivers and the problem continues.
This is the requested good/bad picture:
Added subscriber: @BassamKurdali
I can confirm the same behavior on my laptop, nvidia card, using the latest drivers supplied by rpmfusion on fedora 21.
It does not happen on my desktop on fedora 20 :/
The good news is that it happens here for me too :)
I was surprised when I first noticed it, since I don't really recall seeing it initially (or maybe, I just didn't look hard enough). Anyways, I guess the best solution here is just to implement a nicer way of doing fills. The current approach using OpenGL GL_POLYGON mode was intended as an initial implementation so that we have something we can play with.
NVidia GeForce GT 740M - 331.82
Added subscribers: @JoshuaLeung, @CodeManX
@JoshuaLeung: are you planning on rolling custom tessellation code to allow PacMan? There are two algorithms used elsewhere, scanlines and ear-clipping (ideasman probably knows best)
@CodeManX My preference at this stage is to reuse the method used for Lasso drawing. The only problem there is figuring out what plane to draw on / ensuring that the layering order remains sane.
Added subscriber: @ideasman42
This is caused by
glEnable(GL_POLYGON_SMOOTH);, disabling fixesThis issue was referenced by
387d91829dChanged status from 'Open' to: 'Resolved'
Closed by commit
387d91829d.@ideasman42 Thanks for finding that! Indeed, reading up on this, it seems to indeed be quite problematic.
A note for artists using Grease Pencil after this fix:
You'll need to enable Viewport Multisampling to avoid the jaggies which will now show up again on the edges of volumetric strokes and filled areas.