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Amir Shehata (amir.shehata)
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User Since
Nov 22 2018, 10:54 PM (124 w, 1 d)

Recent Activity

Fri, Apr 2

Amir Shehata (amir.shehata) added a comment to T87107: EEVEE principled bsdf shader no longer handles negative specular values gracefully.

Could this be related to: https://developer.blender.org/T86578
From @Evan Wilson (EAW) description:
" Values <0 will make the output black. Values ⪅ -0.9 cause the shader to flicker between white and black using the slider, "
Could this result in the fireflies we see during the render?

Fri, Apr 2, 12:49 AM · EEVEE & Viewport, BF Blender

Thu, Apr 1

Amir Shehata (amir.shehata) added a comment to T87107: EEVEE principled bsdf shader no longer handles negative specular values gracefully.

I duplicated the texture and made the one that goes to the specular "non-color", that seemed to resolve the problem on 2.93.
This is a behavior difference between 2.92 and 2.93. Is that intended?

Thu, Apr 1, 6:59 PM · EEVEE & Viewport, BF Blender
Amir Shehata (amir.shehata) added a comment to T87107: EEVEE principled bsdf shader no longer handles negative specular values gracefully.

Here is a simple blend file which shows the issue.


You can open the file in 2.93 and see the issue.
If you open it in 2.92 it looks fine.
In 2.93, if you disconnect the specular input of the principled shader, then the problem disappears (as far as I can see).

Thu, Apr 1, 6:38 PM · EEVEE & Viewport, BF Blender
Amir Shehata (amir.shehata) created T87107: EEVEE principled bsdf shader no longer handles negative specular values gracefully.
Thu, Apr 1, 5:43 AM · EEVEE & Viewport, BF Blender

Wed, Mar 31

Amir Shehata (amir.shehata) created T87072: Fireflies in EEVEE render.
Wed, Mar 31, 7:56 AM · BF Blender

Feb 24 2021

Amir Shehata (amir.shehata) added a comment to T85831: Strange EEVEE flickering and lack of clarity.

This has already been fixed with the change in https://developer.blender.org/T85609
https://developer.blender.org/rBd45a89ee443ec4469505caef4a7d64e525da08fd
I already tested with that patch and it seems to work.
thanks

Feb 24 2021, 9:49 PM · BF Blender

Feb 21 2021

Amir Shehata (amir.shehata) added a comment to T85831: Strange EEVEE flickering and lack of clarity.

I did a git bisect and narrowed the issue to this commit:
000a340afa67a12a38c103e19f7d52ed42c4492e (HEAD -> test2) EEVEE: Depth of field: New implementation

Feb 21 2021, 2:30 AM · BF Blender
Amir Shehata (amir.shehata) updated the task description for T85831: Strange EEVEE flickering and lack of clarity.
Feb 21 2021, 1:01 AM · BF Blender
Amir Shehata (amir.shehata) updated the task description for T85831: Strange EEVEE flickering and lack of clarity.
Feb 21 2021, 1:00 AM · BF Blender
Amir Shehata (amir.shehata) created T85831: Strange EEVEE flickering and lack of clarity.
Feb 21 2021, 12:57 AM · BF Blender

Jul 1 2020

Amir Shehata (amir.shehata) created T78483: EEVEE animation render crashes periodically .
Jul 1 2020, 2:20 AM · BF Blender

Feb 20 2020

Amir Shehata (amir.shehata) added a comment to T74021: IK Rig broken on link.

Another thing I noticed is that if you have a shape-key with a driver on it, and you delete the shape-key the driver doesn't go away. But we start seeing errors like this on the console:

Feb 20 2020, 7:35 PM · BF Blender
Amir Shehata (amir.shehata) added a comment to T74021: IK Rig broken on link.

I think I pinpointed the strange behaviour I've been seeing:

  1. the rig hides behind the linked character: https://youtu.be/KseYU22q3nM?t=56 till 1:47
  2. Strange IK rotation: https://youtu.be/KseYU22q3nM?t=173
    • the rotation snaps in the correct place when I manually enter an exact degree as I show in the video
Feb 20 2020, 4:05 AM · BF Blender

Feb 19 2020

Amir Shehata (amir.shehata) created T74021: IK Rig broken on link.
Feb 19 2020, 11:00 PM · BF Blender

Aug 29 2019

Amir Shehata (amir.shehata) changed the status of T69277: Shading error in b2.81 from Unknown Status to Archived.
Aug 29 2019, 6:48 AM · BF Blender
Amir Shehata (amir.shehata) added a comment to T69277: Shading error in b2.81.

I found out the issue. It's the subsurface scattering node in the teeth material. Doesn't look like it's an issue. Just wrong setting.

Aug 29 2019, 6:48 AM · BF Blender
Amir Shehata (amir.shehata) created T69277: Shading error in b2.81.
Aug 29 2019, 4:27 AM · BF Blender

Jun 30 2019

Amir Shehata (amir.shehata) added a comment to T66262: Extremely slow preview icon loading.

Just to clarify in my case what I see is that some icons are not displayed at all.

Jun 30 2019, 4:56 PM · BF Blender
Amir Shehata (amir.shehata) created T66262: Extremely slow preview icon loading.
Jun 30 2019, 3:47 AM · BF Blender

Jun 9 2019

Amir Shehata (amir.shehata) added a comment to T60490: Crash after deleting driver with script.

I tired the above steps with the latest blender and it appears like the issue has been resolved. Thanks for all the great work on Blender

Jun 9 2019, 5:47 PM · BF Blender

Jun 5 2019

Amir Shehata (amir.shehata) created T65507: Blender Crashes.
Jun 5 2019, 4:13 AM · BF Blender

Mar 18 2019

Amir Shehata (amir.shehata) added a comment to T60490: Crash after deleting driver with script.

Yes it is.

Mar 18 2019, 7:43 AM · BF Blender

Jan 15 2019

Amir Shehata (amir.shehata) added a comment to T60490: Crash after deleting driver with script.

Hi Brecht,

Jan 15 2019, 9:45 PM · BF Blender

Jan 14 2019

Amir Shehata (amir.shehata) created T60490: Crash after deleting driver with script.
Jan 14 2019, 6:02 AM · BF Blender

Jan 10 2019

Amir Shehata (amir.shehata) added a comment to T60240: Crash while working on drivers.

I'm unable to reproduce with the latest build.

Jan 10 2019, 8:44 PM · BF Blender

Jan 6 2019

Amir Shehata (amir.shehata) added a comment to T60240: Crash while working on drivers.

Here are more concrete steps I was able to use to reproduce the crash:

  1. Add driver to one of the facial expressions in the file
  2. Edit the driver by right clicking and then selecting "edit driver'
  3. Change the expression from var -> -var
  4. Copy the driver
  5. Paste it on a different facial expression
  6. Edit the driver by right clicking and then selecting "edit driver"
  7. change the expression from -var to var
  8. Go to the bone controlling the driver and move it
  9. Crash occurs
Jan 6 2019, 10:45 PM · BF Blender
Amir Shehata (amir.shehata) created T60240: Crash while working on drivers.
Jan 6 2019, 6:27 PM · BF Blender

Jan 2 2019

Amir Shehata (amir.shehata) created D4157: camera_dolly_crane_rigs - hide widgets.
Jan 2 2019, 11:36 PM

Dec 27 2018

Amir Shehata (amir.shehata) added a comment to D4122: ANT Landscape blender 2.80 Port.

Makes sense. Thanks for the explanation.

Dec 27 2018, 10:07 PM
Amir Shehata (amir.shehata) updated the diff for D4122: ANT Landscape blender 2.80 Port.

put the reversed traversal in the unregister, instead of the register.

Dec 27 2018, 9:45 PM
Amir Shehata (amir.shehata) added a comment to D4124: Port ant landscapes presets to blender 2.80.

This is now a duplicate of: https://developer.blender.org/D4122

Dec 27 2018, 8:26 PM · Add-ons (Community)
Amir Shehata (amir.shehata) updated the diff for D4122: ANT Landscape blender 2.80 Port.

Addressed JacquesLucke's comments.
Added the update for the landscape presets as part of this diff

Dec 27 2018, 6:22 PM
Amir Shehata (amir.shehata) added a comment to D4122: ANT Landscape blender 2.80 Port.

Made the changes. Will be submitting an update shortly.
And yes, I tested the add-on with its different settings and it appears to be working similar to 2.79

Dec 27 2018, 6:06 PM
Amir Shehata (amir.shehata) created D4124: Port ant landscapes presets to blender 2.80.
Dec 27 2018, 5:25 AM · Add-ons (Community)
Amir Shehata (amir.shehata) created D4122: ANT Landscape blender 2.80 Port.
Dec 27 2018, 2:25 AM

Dec 24 2018

Amir Shehata (amir.shehata) added a comment to T59773: Crash accessing python gpu module in background mode..

animation nodes addon also triggers this crash
Also tested the patch and it works.

Dec 24 2018, 11:36 PM · EEVEE & Viewport, Add-ons (Community), Add-ons (BF-Blender), BF Blender

Dec 23 2018

Amir Shehata (amir.shehata) added a comment to T59787: Blender 2.80 crash when running in batch mode.

Ok it's Measureit addon that's crashing blender. Thanks for the quick turn around.

Dec 23 2018, 1:05 PM · BF Blender
Amir Shehata (amir.shehata) added a comment to T59787: Blender 2.80 crash when running in batch mode.

Looks like the issue is in gpu_shader.c:
363 »···if (vertexcode)
364 »···»···shader->vertex = glCreateShader(GL_VERTEX_SHADER);

Dec 23 2018, 12:51 PM · BF Blender
Amir Shehata (amir.shehata) created T59788: Rigify Fix.
Dec 23 2018, 11:07 AM · BF Blender
Amir Shehata (amir.shehata) created T59787: Blender 2.80 crash when running in batch mode.
Dec 23 2018, 11:02 AM · BF Blender
Amir Shehata (amir.shehata) created T59778: Fixed a problem with release/scripts/addons/camera_dolly_crane_rigs.py.
Dec 23 2018, 1:41 AM · BF Blender

Dec 10 2018

Amir Shehata (amir.shehata) created T59096: Updated a python script to 2.8.
Dec 10 2018, 12:39 AM · BF Blender

Dec 4 2018

Amir Shehata (amir.shehata) added a comment to T58678: Crash when undoing.

never mind. I'm able to generate core files now. I'll make sure to include it in future tickets

Dec 4 2018, 10:23 AM · BF Blender
Amir Shehata (amir.shehata) added a comment to T58678: Crash when undoing.

I'm unable to reproduce at this point.
When I got the crash I had gone into these steps:

  1. enter edit mode for the shoes in the blend file
  2. rotate, resize, move
  3. go into object mode,
  4. resize the object
  5. Undo by Cntrl+Z several times, then the crash occurred.
Dec 4 2018, 7:10 AM · BF Blender
Amir Shehata (amir.shehata) created T58678: Crash when undoing.
Dec 4 2018, 4:35 AM · BF Blender
Amir Shehata (amir.shehata) created T58670: Crash in 2.8 while using the spin tool in edit mode.
Dec 4 2018, 12:39 AM · BF Blender

Dec 1 2018

Amir Shehata (amir.shehata) created T58467: b28: shift+left click doesn't select.
Dec 1 2018, 9:11 PM · BF Blender

Nov 30 2018

Amir Shehata (amir.shehata) added a comment to T58344: Bone Wire Display not working .

Jacques, thanks for looking at it. Attached is a screenshot from 2.79. Option is useful when working multiple overlayed bones.

Nov 30 2018, 8:25 PM · BF Blender
Amir Shehata (amir.shehata) created T58344: Bone Wire Display not working .
Nov 30 2018, 6:30 PM · BF Blender
Amir Shehata (amir.shehata) updated the task description for T58323: Crash in 2.8 when Alt+left click on bone while in paint mode.
Nov 30 2018, 4:04 PM · BF Blender
Amir Shehata (amir.shehata) updated the task description for T58323: Crash in 2.8 when Alt+left click on bone while in paint mode.
Nov 30 2018, 4:03 PM · BF Blender
Amir Shehata (amir.shehata) created T58323: Crash in 2.8 when Alt+left click on bone while in paint mode.
Nov 30 2018, 4:02 PM · BF Blender