Graphics issue or bad UVs (Mudbox)
polycounter lvl 6
Hello,
I am seeing painting artifacts when I import my model into Mudbox 2014 and wanted to know how I could stop them. I have researched a little bit and found someone suggesting it could be a graphics driver issue while others say that it is a question of bad UVs. I would really appreciate your help in finding the source of this problem and your suggestions to how I could fix this. I'm still an early learner so don't know how to judge if my UVs are good enough quality.
images below:
Other forum posts:
http://forums.cgsociety.org/showthread.php?f=221&t=885366
http://www.polycount.com/forum/showthread.php?p=1989054#post1989054
I am seeing painting artifacts when I import my model into Mudbox 2014 and wanted to know how I could stop them. I have researched a little bit and found someone suggesting it could be a graphics driver issue while others say that it is a question of bad UVs. I would really appreciate your help in finding the source of this problem and your suggestions to how I could fix this. I'm still an early learner so don't know how to judge if my UVs are good enough quality.
images below:
Other forum posts:
http://forums.cgsociety.org/showthread.php?f=221&t=885366
http://www.polycount.com/forum/showthread.php?p=1989054#post1989054
Replies
@Wiki What are the signs of flipped UVs? I tested out the model with a numbered checker texture but didn't see any flipped numbers on the model itself. Is this the correct way of testing flipped UVs
@oglu thank you for the suggestion oglu. How would I be able to see this problem in Maya and also what can I do to fix the problem?
Apologies for asking questions that may seem a bit basic but I have been trying to do my own research before posting again and have been finding it difficult to find an answer.
Thank you guys for your help
I had this recently when I exported to mari. Each UV Polygon was disconnected and flipped 180°. This happened to me when I used the OBJ exporter.
i have autodesk certified/recommended FireGL card, can sculpt on 100mil polygons without lag AND i still got the same issue as above.
one of the many reasons i didnt upgrade. 2011 works much better for painting.
While researching the problem I found another possible route for solving the issue which involves adding the environment variable "MUDBOX_PAINT_CONTEXT_FLUSH" to flush the paint cache inbetween strokes.
I would like to try this because I do not own a copy of mudbox 2011 but am unsure what information to put into the windows control panel. Could someone assist me? (definitely getting out of my depth)
Edit- Just checked the Mudbox 2014 Service Pack 2 page and it suggests using this environment variable. "With AMD graphics cards, if you are seeing texture painting corruption such as painting black and artifacts adding the environment variable "MUDBOX_PAINT_CONTEXT_FLUSH" may fix the problem."
from what it looks like the variable name is "MUDBOX_PAINT_CONTEXT_FLUSH" and variable value should be "1" if it is an on and off thing.
but i doubt this is a texture cache issue. please let me know if it works.
I had a number of problems with mudbox (artifacts like in the thread, "missing" projection because of too low-poly mesh, layers blending that gives different results when in Photoshop and when in Mudbox, etc...). I wouldn't work with such unpredictable software in production environment. Haven't encountered anything like that in 3dcoat so far.
And also 3dcoat costs less than Mudbox, which is nice