Texture images are not properly displayed in the material preview in BI when using SSS #40364

New Issue

Riccardo Giovanetti · 2014-05-26T12:19:10+02:00

2014-05-26 12:19:10 +02:00

System Information
i7 720QM 1.6GHz, Windows 7 Pro 64bit w/SP1, 8GB RAM, Nvidia GeForce GTS 360M w/1GB VRAM

Blender Version
Broken: 2.70a (Hash: f93bc76) 64bit (blender-2.70a-windows64.zip)
Broken: 2.71 testbuild1 (Hash: c56bbcc) 64bit (blender-2.71-testbuild1-win64.zip)
Worked: 2.69.0 64bit (r60995)

Short description of error
In the above 2.71 testbuild as well as in the 2.70a revision I noticed that if a material in Blender Internal has an image texture applied and mapped to it, as soon as you activate the Subsurface Scattering option in the Material properties panel the texture is no longer visible in the material preview window if the SSS Blend for Textures is set to value 0, and becomes visible the more you raise this value becoming fully visible at Blend Texture value of 1. The image texture is instead displayed correctly in Blender version 2.69.

I don't know if this was an intentional design change or if it's a bug but surely it doesn't help to evaluate the SSS effect correctly unless you render the object. Please, let me know if I misunderstood the BI SSS behaviour or else. Thanks.

Exact steps for others to reproduce the error
Open Blender and set it to Blender Internal render, with the default scene and the default material assigned to the cube go to the material's textures panel, change the texture type to Image or Movie and assign any image to the cube (you can set texture Mapping to Generated, Cube Projection). Then, go back to the Material tab and tick the SSS option; with the Blend Texture at value 0 the image texture previously visible in the material preview box is now gone and the material displays only the base diffuse color. If you raise the Blend Texture value the mapped image start becoming visible until you reach value of 1 where it's fully displayed in the preview.

**System Information** i7 720QM 1.6GHz, Windows 7 Pro 64bit w/SP1, 8GB RAM, Nvidia GeForce GTS 360M w/1GB VRAM **Blender Version** Broken: 2.70a (Hash: f93bc76) 64bit (blender-2.70a-windows64.zip) Broken: 2.71 testbuild1 (Hash: c56bbcc) 64bit (blender-2.71-testbuild1-win64.zip) Worked: 2.69.0 64bit (r60995) **Short description of error** In the above 2.71 testbuild as well as in the 2.70a revision I noticed that if a material in Blender Internal has an image texture applied and mapped to it, as soon as you activate the Subsurface Scattering option in the Material properties panel the texture is no longer visible in the material preview window if the SSS Blend for Textures is set to value 0, and becomes visible the more you raise this value becoming fully visible at Blend Texture value of 1. The image texture is instead displayed correctly in Blender version 2.69. I don't know if this was an intentional design change or if it's a bug but surely it doesn't help to evaluate the SSS effect correctly unless you render the object. Please, let me know if I misunderstood the BI SSS behaviour or else. Thanks. **Exact steps for others to reproduce the error** Open Blender and set it to Blender Internal render, with the default scene and the default material assigned to the cube go to the material's textures panel, change the texture type to Image or Movie and assign any image to the cube (you can set texture Mapping to Generated, Cube Projection). Then, go back to the Material tab and tick the SSS option; with the Blend Texture at value 0 the image texture previously visible in the material preview box is now gone and the material displays only the base diffuse color. If you raise the Blend Texture value the mapped image start becoming visible until you reach value of 1 where it's fully displayed in the preview.

Riccardo Giovanetti commented

2014-05-26 12:19:10 +02:00

Changed status to: 'Open'

Riccardo Giovanetti commented

2014-05-26 12:19:10 +02:00

Added subscriber: @Harvester

Thomas Dinges commented

2014-05-27 13:59:16 +02:00

Added subscriber: @ThomasDinges

Lukas Tönne commented

2014-06-01 14:45:46 +02:00

Added subscriber: @LukasTonne

Lukas Tönne commented

2014-06-01 14:45:46 +02:00

SSS generally doesn't seem to work in BI previews any longer. Whether this is a deliberate change or a bug i can't say. It's a bit difficult to see in 2.69 previews, but you can increase the sss scale and in 2.70 you can increase the preview size as well, so it becomes quite clear there is no sss happening at all in 2.70.

Lukas Tönne commented

2014-06-01 14:48:13 +02:00

Test file: test_03.blend

Test file: [test_03.blend](https://archive.blender.org/developer/F92260/test_03.blend)

Riccardo Giovanetti commented

2014-06-28 12:54:41 +02:00

Hi Lukas, so it's confirmed SSS doesn't work in BI previews any longer also with the latest 2.71 version, but since the 3D Viewport Shading "Rendered" works fine in displaying the SSS effect in BI, there is a way to preview it in realtime on materials.

I will look forward for this problem to be eventually corrected in the future and thank you.

Hi Lukas, so it's confirmed SSS doesn't work in BI previews any longer also with the latest 2.71 version, but since the 3D Viewport Shading "Rendered" works fine in displaying the SSS effect in BI, there is a way to preview it in realtime on materials. I will look forward for this problem to be eventually corrected in the future and thank you.

Sergey Sharybin self-assigned this 2014-07-01 19:51:45 +02:00

Sergey Sharybin commented

2014-07-01 19:51:45 +02:00

Was thinking another day, why not look into this report :)