vertex color light is not displayed definitely. #45660

New Issue

perfection cat · 2015-08-03T05:02:32+02:00

perfection cat commented

2015-08-03 05:02:32 +02:00

System Information
Windows XP/SP3 32bits

Blender Version
Broken: version 2.75 (sub 3), branch b'master', commit date b'2015-08-01' b'02:37', hash b'49f8832', b'Release'
Worked: unknown

Short description of error
vertex color light is not displayed definitely.
Exact steps for others to reproduce the error
vertex color light is not displayed definitely.
I do not know whether honesty this is a bug.
An official manual too has few descriptions about "vertex color light".
Only vertex color of last vertex is used for two colors a figure for coating in primitive Plane.
I think that the blended color of the color of each vertex was used in the early version of 2.6.
{F217726}
VCL2753.blend

**System Information** Windows XP/SP3 32bits **Blender Version** Broken: version 2.75 (sub 3), branch b'master', commit date b'2015-08-01' b'02:37', hash b'49f8832', b'Release' Worked: unknown **Short description of error** vertex color light is not displayed definitely. **Exact steps for others to reproduce the error** vertex color light is not displayed definitely. I do not know whether honesty this is a bug. An official manual too has few descriptions about "vertex color light". Only vertex color of last vertex is used for two colors a figure for coating in primitive Plane. I think that the blended color of the color of each vertex was used in the early version of 2.6. {[F217726](https://archive.blender.org/developer/F217726/VCL2753_2.png)}![VCL2753.png](https://archive.blender.org/developer/F217728/VCL2753.png) [VCL2753.blend](https://archive.blender.org/developer/F217730/VCL2753.blend)

perfection cat commented

2015-08-03 05:02:32 +02:00

Changed status to: 'Open'

perfection cat commented

2015-08-03 05:02:32 +02:00

Added subscriber: @sindra1961

Campbell Barton commented

2015-08-03 15:30:46 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2015-08-03 15:30:46 +02:00

Changed status from 'Open' to: 'Archived'

Campbell Barton closed this issue

2015-08-03 15:30:46 +02:00

Campbell Barton self-assigned this 2015-08-03 15:30:46 +02:00

Campbell Barton commented

2015-08-03 15:30:47 +02:00

This isnt a bug, the alpha is set to zero in this file. closing.

perfection cat commented

2015-08-04 03:15:06 +02:00

@ideasman42:
It is described "Vertex color light " in an official manual in this way.

Vertex Color Light
    Add vertex paint colors as additional lighting. (This can be used to produce good incandescence effects).

There is not the description except this.
Is a cause displayed with one color that alpha of the material is zero?
However, it becomes a result same as an attached image even if I set it other than 0.

@ideasman42: It is described "[Vertex color light ](http://www.blender.org/manual/render/blender_render/materials/properties/options.html)" in an official manual in this way. ``` Vertex Color Light Add vertex paint colors as additional lighting. (This can be used to produce good incandescence effects). ``` There is not the description except this. Is a cause displayed with one color that alpha of the material is zero? However, it becomes a result same as an attached image even if I set it other than 0.

perfection cat commented

2015-08-04 08:15:22 +02:00

Left-Up: Plane
Right-Up: Circle+Fill
Left-Down: Plane with 4 faces
Right Down: Circle + Fill with 4 faces NGons
The alpha of all samples is zero.
VertexColorLight.blend

![screen.png](https://archive.blender.org/developer/F218884/screen.png) Left-Up: Plane Right-Up: Circle+Fill Left-Down: Plane with 4 faces Right Down: Circle + Fill with 4 faces NGons The alpha of all samples is zero. [VertexColorLight.blend](https://archive.blender.org/developer/F218886/VertexColorLight.blend)

Campbell Barton commented

2015-08-06 01:48:08 +02:00

Changed status from 'Archived' to: 'Open'

Campbell Barton reopened this issue

2015-08-06 01:48:08 +02:00

Campbell Barton commented

2015-08-06 01:48:08 +02:00

Re-opening. This is indeed a bug.

The light from the vertex color is using one of the vertex colors in the face.

Re-opening. This is indeed a bug. The light from the vertex color is using one of the vertex colors in the face.

Sergey Sharybin commented

2015-08-06 10:29:59 +02:00

Added subscriber: @Sergey

Sergey Sharybin commented

2015-08-06 10:29:59 +02:00

@ideasman42, are you looking into this issue?

Campbell Barton commented

2015-08-06 10:31:03 +02:00

@Sergey, no, not short term.

Campbell Barton commented

2015-08-24 09:13:55 +02:00

Changed status from 'Open' to: 'Archived'

Campbell Barton closed this issue

2015-08-24 09:13:55 +02:00

Campbell Barton commented

2015-08-24 09:13:55 +02:00

While the behavior isn't really nice.
Checked the code and am afraid this is working as intended.

Vertex color light is taking a single sample point from a face.
See: occ_shade, which calls shade_input_set_shade_texco with fixed U/V values.

While the behavior isn't really nice. Checked the code and am afraid this is working as intended. Vertex color light is taking a single sample point from a face. See: `occ_shade`, which calls `shade_input_set_shade_texco` with fixed U/V values.

perfection cat commented

2015-08-24 09:34:10 +02:00

I did not know it whether it was right to use which color as vertex color light in the case of single face.
I tried it in 2.50a2 and 2.53, but understood it because I obtained the same result when probably this was the present specifications.
Thanks.

I did not know it whether it was right to use which color as vertex color light in the case of single face. I tried it in 2.50a2 and 2.53, but understood it because I obtained the same result when probably this was the present specifications. Thanks.

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vertex color light is not displayed definitely. #45660