Fresnel node: difference between 2.76 and 2.78 GLSL output #49372

New Issue

Michael Otto · 2016-09-16T10:01:19+02:00

Michael Otto commented

2016-09-16 10:01:19 +02:00

Blender Version
Broken: 2.76
Worked: 2.78

Short description of error
The GLSL viewport output (Renderer: Blaner internal / game) of the Fresnel node differs from 2.76 to 2.78

fresnel issue.blend

Exact steps for others to reproduce the error
open file in 2.76 and 2.78

fresnel issue.blend

**Blender Version** Broken: 2.76 Worked: 2.78 **Short description of error** The GLSL viewport output (Renderer: Blaner internal / game) of the Fresnel node differs from 2.76 to 2.78 [fresnel issue.blend](https://archive.blender.org/developer/F360968/fresnel_issue.blend) **Exact steps for others to reproduce the error** open file in 2.76 and 2.78 [fresnel issue.blend](https://archive.blender.org/developer/F360969/fresnel_issue.blend)

Michael Otto commented

2016-09-16 10:01:19 +02:00

Changed status to: 'Open'

Michael Otto commented

2016-09-16 10:01:19 +02:00

Added subscriber: @MichaelOtto

Bastien Montagne commented

2016-09-16 10:37:35 +02:00

Added subscribers: @MikeErwin, @Sergey, @brecht, @mont29

Bastien Montagne commented

2016-09-16 10:37:35 +02:00

The fact that the result differs that not means it's a bug… But in this case new version is indeed bad - was regression between 2.76 and 2.77 it seems.

@Sergey, @MikeErwin, @brecht, one of you guys know more about it?

The fact that the result differs that not means it's a bug… But in this case new version is indeed bad - was regression between 2.76 and 2.77 it seems. @Sergey, @MikeErwin, @brecht, one of you guys know more about it?

Philipp Oeser commented

2016-09-16 10:44:06 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2016-09-16 10:44:06 +02:00

is this using the cycles Fresnel node? (not sure if this is even supposed to work with BI/GameEngine...)

Sergey Sharybin self-assigned this 2016-09-16 10:54:58 +02:00

Sergey Sharybin commented

2016-09-16 10:54:58 +02:00

The fresnel seems wrong to me in the current master. My guess it's the normal space (world vs. camera). Checking that.

Philipp Oeser commented

2016-09-16 11:18:23 +02:00

change came in 002de

Michael Otto commented

2016-09-16 11:24:03 +02:00

Hi, I was a little in a haste because I had a meeting starting... sorry. Here's my addition

I also have the impression that it's something with the normals. When you disconnect the normals from the geom node, it gives correct results ("correct" = looks as exspected by me ;) )

Hi, I was a little in a haste because I had a meeting starting... sorry. Here's my addition I also have the impression that it's something with the normals. When you disconnect the normals from the geom node, it gives correct results ("correct" = looks as exspected by me ;) )

Philipp Oeser commented

2016-09-16 11:26:03 +02:00

@Sergey: cycles viewport seems fine to me, you mean BI/BGE use camera space normals whereas cycles uses world?

Philipp Oeser commented

2016-09-16 11:29:02 +02:00

@MichaelOtto: yep if you dont have a normal connected it will use GPU_VIEW_NORMAL, if you've got somethink linked it multiplies GPU_VIEW_MATRIX with this

blender-admin commented

2016-09-16 11:48:42 +02:00

This issue was referenced by 4b046c530d

This issue was referenced by 4b046c530d3e14d7737c4770b9ae07942f4c6047

Sergey Sharybin commented

2016-09-16 11:49:03 +02:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2016-09-16 11:49:03 +02:00

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Fresnel node: difference between 2.76 and 2.78 GLSL output #49372