Incorrect display normal-map on model with 2 UV's #33810

New Issue

Michael Soluyanov · 2013-01-08T22:13:53+01:00

Michael Soluyanov commented

2013-01-08 22:13:53 +01:00

%%%--- Operating System, Graphics card ---
Ubuntu 12.10

- Blender version with error, and version that worked ---

Tested on:
2.56 (from blender.org)
r53596 (ppa)
r53473 (ppa)

- Short description of error ---

Even when UV-channel is set, normal-map displayed differently, while selecting different UV-sets in "Object Data"

- Steps for others to reproduce the error (preferably based on attached .blend file) ---

Turn on GLSL materials.
Open "Object Data" buttons and try to select different UV-sets.
You should see what the normals (pimples) turn inside.

%%%

%%%--- Operating System, Graphics card --- Ubuntu 12.10 - Blender version with error, and version that worked --- Tested on: 2.56 (from blender.org) r53596 (ppa) r53473 (ppa) - Short description of error --- Even when UV-channel is set, normal-map displayed differently, while selecting different UV-sets in "Object Data" - Steps for others to reproduce the error (preferably based on attached .blend file) --- 1) Turn on GLSL materials. 2) Open "Object Data" buttons and try to select different UV-sets. 3) You should see what the normals (pimples) turn inside. %%%

Michael Soluyanov commented

2013-01-08 22:13:53 +01:00

Changed status to: 'Open'

Michael Soluyanov commented

2013-01-09 04:38:20 +01:00

%%%Same in render.%%%

Sergey Sharybin commented

2013-01-09 12:07:50 +01:00

%%%Seems tangent space calculation always uses active UV layer and think it's better be using render layer instead. At least for render it shall use it. Here's a patch which solve this.

Brecht, couple of questions:

Is it indeed bug here or it's actually how it's intended to work? (which is confusing actually)
Shouldn't we support multiple tangent spaces?
Afraid this patch will break some files..
Which UV layer should be used for viewport render?%%%

%%%Seems tangent space calculation always uses active UV layer and think it's better be using render layer instead. At least for render it shall use it. Here's a patch which solve this. Brecht, couple of questions: - Is it indeed bug here or it's actually how it's intended to work? (which is confusing actually) - Shouldn't we support multiple tangent spaces? - Afraid this patch will break some files.. - Which UV layer should be used for viewport render?%%%

Michael Soluyanov commented

2013-01-09 12:26:12 +01:00

%%%It is big problem for me, because I use other UV layer for coloring objects on particle system "Base_pero" using "From Dupli" method. So for normals needs one layer, for "From Dupli" - second one%%%

Brecht Van Lommel commented

2013-01-15 12:17:51 +01:00

%%%Ideally multiple tangent spaces should be supported, but it indeed was not implemented. This patch would probably break quite a few existing files, better solution would be to implement this properly but at the moment not sure how difficult it would be.%%%

Sergey Sharybin commented

2013-01-15 18:12:33 +01:00

%%%Brecht, by "implement this properly" you mean add support of multiple tangent spaces?

I've looked into shadeinput and seems it first calculates tangent space and then applies all the textures. If it's indeed so afraid i'll need to rewrite some areas here :) If you think it worth doing i could spend time supporting this.%%%

%%%Brecht, by "implement this properly" you mean add support of multiple tangent spaces? I've looked into shadeinput and seems it first calculates tangent space and then applies all the textures. If it's indeed so afraid i'll need to rewrite some areas here :) If you think it worth doing i could spend time supporting this.%%%

Sergey Sharybin commented

2013-07-31 06:16:49 +02:00

%%%This is probably not so much difficult to support, but it requires quite a few of changes in BI renderer. I'll move the report to our TODO list (http://wiki.blender.org/index.php/Dev:2.5/Source/Development/Todo/Render#Render_Engine) since it's not actual bug, but just a limitation of current system.%%%

Sergey Sharybin commented

2013-07-31 06:16:49 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2013-07-31 06:16:49 +02:00

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Incorrect display normal-map on model with 2 UV's #33810