Painting in 3D view produces gap at seams, or wont paint at all. #44344

New Issue

Olson Burry · 2015-04-10T21:08:45+02:00

Olson Burry commented

2015-04-10 21:08:45 +02:00

System Information
Linux Mint (cinnamon) 17.1 64bit
16GB RAM
GTX970
official

Blender Version
Broken: 2.70 - 2.74 current master (from today)
Worked: couldn't find one.

Short description of error

Painting at some zoom levels produces a visible gap in the texture paint where seams fall on the 3D object.

Exact steps for others to reproduce the error

Open the .blend file attached and paint a stroke across the object. There should appear a line at the edge with the seam on. Looking in the UV image editor at this place it the pixels appear offset by 1 ( dont think related to #44308 ?)

I can turn off occlude, cull, normal, I've tried setting the bleed higher and lower to no avail I'm afraid.

Note that if the view is zoomed in too far, the paint doesn't seem to work at all, and it's zooming out just enough that the paint begins to work where the issue on the seams becomes most apparent. Ortho view seems kind of ok, though.

Thank you kindly.

bugtest.blend

**System Information** Linux Mint (cinnamon) 17.1 64bit 16GB RAM GTX970 official **Blender Version** Broken: 2.70 - 2.74 current master (from today) Worked: couldn't find one. **Short description of error** Painting at some zoom levels produces a visible gap in the texture paint where seams fall on the 3D object. **Exact steps for others to reproduce the error** Open the .blend file attached and paint a stroke across the object. There should appear a line at the edge with the seam on. Looking in the UV image editor at this place it the pixels appear offset by 1 ( dont think related to #44308 ?) I can turn off occlude, cull, normal, I've tried setting the bleed higher and lower to no avail I'm afraid. Note that if the view is zoomed in too far, the paint doesn't seem to work at all, and it's zooming out just enough that the paint begins to work where the issue on the seams becomes most apparent. Ortho view seems kind of ok, though. Thank you kindly. ![pixeloff.jpg](https://archive.blender.org/developer/F160663/pixeloff.jpg) [bugtest.blend](https://archive.blender.org/developer/F160665/bugtest.blend)

Olson Burry commented

2015-04-10 21:08:45 +02:00

Changed status to: 'Open'

Olson Burry commented

2015-04-10 21:08:45 +02:00

Added subscriber: @OliverBurn

Antonis Ryakiotakis was assigned by Sergey Sharybin

2015-04-14 11:33:46 +02:00

Sergey Sharybin commented

2015-04-14 11:33:46 +02:00

Added subscriber: @Sergey

Sergey Sharybin commented

2015-04-14 11:33:46 +02:00

Antony, mind having a look? Thanks! :)

Campbell Barton commented

2015-05-14 11:01:12 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2015-05-14 11:01:13 +02:00

Looked into this report and fixed some related issues.

Need to investigate further, but this looks to be a problem converting the bucket bounds from screenspace into UV space.

See:

  fac1 = line_point_factor_v2(bucket_clip_edges[0], vCoSS[fidx1], vCoSS[fidx2]);
  fac2 = line_point_factor_v2(bucket_clip_edges[1], vCoSS[fidx1], vCoSS[fidx2]);

It looks like we better un-project these values so the factor can be calculated without the perspective matrix causing problems.

Looked into this report and fixed some related issues. - 9207c8d669 - 1a0fb7e9ae - a050d6063c - 3e782756e3 Need to investigate further, but this looks to be a problem converting the bucket bounds from screenspace into UV space. See: ``` fac1 = line_point_factor_v2(bucket_clip_edges[0], vCoSS[fidx1], vCoSS[fidx2]); fac2 = line_point_factor_v2(bucket_clip_edges[1], vCoSS[fidx1], vCoSS[fidx2]); ``` It looks like we better un-project these values so the factor can be calculated without the perspective matrix causing problems.

WK Bong commented

2015-05-16 16:50:56 +02:00

Added subscriber: @WeeKwongBong

blender-admin commented

2015-09-10 18:33:51 +02:00

This issue was referenced by 37f4660637

This issue was referenced by 37f46606374f37dbe73c3555dc04c96a56e90bf3

Campbell Barton commented

2015-09-10 18:39:44 +02:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2015-09-10 18:39:44 +02:00

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Painting in 3D view produces gap at seams, or wont paint at all. #44344