Maniphest T25931

Raytraced AO + strand render leads to weird tiled image
Closed, Resolved
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Assigned To
Brecht Van Lommel (brecht)
Authored By
Paulo Bardes (bardes)
Feb 4 2011, 1:42 AM
Tags
  • Render Pipeline
  • BF Blender
Subscribers
Brecht Van Lommel (brecht)
Paulo Bardes (bardes)
Ton Roosendaal (ton)

Description

==============Info==============
OS:Ubuntu 64-bits 10.10(Maverick)
CPU: Intel i7
Graph card: GeForce GTS 250
Driver version: 260.19.29
Blender revision: 34573
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When I render an image using raytraced AO and strand render the image result is tiled in the Y axis, one tile for each thread. There is a .blend file with an example image and scene.

Example image only: http://img64.imageshack.us/img64/1205/59909359.png

PS: My uploading process failed so I'm posting again, sorry for the mess, if there is a double post please erase the older one.

Event Timeline

Paulo Bardes (bardes) edited a custom field.Feb 4 2011, 1:42 AM
Paulo Bardes (bardes) attached 1 file(s): F17369: renderBug.blend.
Ton Roosendaal (ton) added a comment.Feb 4 2011, 2:33 PM

Error confirmed. There's really a *lot* of strands generated btw, setting the children percentage from 100 to 3 gives error too and renders quick :)

I do know that strands get rendered based on an approximate, only certain points on a strand are being evaluated for shading and AO.
The per-tile clipping of strands in this case seems to be too strict. Will first ask Brecht if he has a quick idea where to seek the issue.

Paulo Bardes (bardes) added a comment.Feb 6 2011, 4:02 PM

I just noticed that the problem happens in both axis, It's just harder to see the y axis because the grass is in the same direction. If you rotate the grass you can see the boxes:

Paulo Bardes (bardes) attached 1 file(s): F17370: untitled.png.Feb 6 2011, 4:02 PM
Brecht Van Lommel (brecht) added a comment.Mar 12 2011, 1:17 AM

Fix in svn, thanks for the report.

Brecht Van Lommel (brecht) changed the task status from Unknown Status to Resolved.Mar 12 2011, 1:17 AM