Color rendered differently between v2.79 and v.79a #54364

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yokotsumo · 2018-03-19T19:39:33+01:00

yokotsumo commented

2018-03-19 19:39:33 +01:00

Gradient.py
System Information
Windows 10
GTX 1070

Blender Version
Broken: 2.79a
Worked: 2.79

Short description of error
Colors are faded a lot when I render with v2.79a compared to v2.79

Exact steps for others to reproduce the error
I am using this material:

	# create the emission material
	mat = bpy.data.materials.new(name="gradient")
	mat.use_nodes = True
	# get the nodes
	nodes = mat.node_tree.nodes

	# clear all nodes to start clean
	for node in nodes:
		nodes.remove(node)

	# create output node
	node_output = nodes.new(type='ShaderNodeOutputMaterial')   
	node_output.location = (1300,0)

	# create diffuse node
	node_diffuse = nodes.new(type='ShaderNodeBsdfDiffuse')
	node_diffuse.location = (1100,0)

	# create colorRamp node
	node_colorRamp = nodes.new(type='ShaderNodeValToRGB')
	node_colorRamp.location = (800,0)
	node_colorRamp.color_ramp.elements[0].color = [0.156, 0.014, 0.153, 1]
	node_colorRamp.color_ramp.elements[1].color = [0.651, 0.485, 0.644, 1]

	# create GradientTexture node
	node_gradientTexture = nodes.new(type='ShaderNodeTexGradient')
	node_gradientTexture.location = (600,0)

	# create Mapping node
	node_mapping = nodes.new(type='ShaderNodeMapping')
	node_mapping.location = (200,0)
	node_mapping.rotation.x = math.pi/2
	node_mapping.rotation.y = math.pi/2

	# create TextureCoordinate node
	node_textureCoordinate = nodes.new(type='ShaderNodeTexCoord')
	node_textureCoordinate.location = (0,0)

	# link nodes
	links = mat.node_tree.links
	link = links.new(node_textureCoordinate.outputs[0], node_mapping.inputs[0])
	link = links.new(node_mapping.outputs[0], node_gradientTexture.inputs[0])
	link = links.new(node_gradientTexture.outputs[0], node_colorRamp.inputs[0])
	link = links.new(node_colorRamp.outputs[0], node_diffuse.inputs[0])
	link = links.new(node_diffuse.outputs[0], node_output.inputs[0])

	text.data.materials.append(bpy.data.materials['gradient'])

The gradient is correctly rendered in v2.79 but is nearly monochrome (first color) with v2.79a

[Gradient.py](https://archive.blender.org/developer/F2466391/Gradient.py) **System Information** Windows 10 GTX 1070 **Blender Version** Broken: 2.79a Worked: 2.79 **Short description of error** Colors are faded a lot when I render with v2.79a compared to v2.79 **Exact steps for others to reproduce the error** I am using this material: ``` # create the emission material mat = bpy.data.materials.new(name="gradient") mat.use_nodes = True # get the nodes nodes = mat.node_tree.nodes # clear all nodes to start clean for node in nodes: nodes.remove(node) # create output node node_output = nodes.new(type='ShaderNodeOutputMaterial') node_output.location = (1300,0) # create diffuse node node_diffuse = nodes.new(type='ShaderNodeBsdfDiffuse') node_diffuse.location = (1100,0) # create colorRamp node node_colorRamp = nodes.new(type='ShaderNodeValToRGB') node_colorRamp.location = (800,0) node_colorRamp.color_ramp.elements[0].color = [0.156, 0.014, 0.153, 1] node_colorRamp.color_ramp.elements[1].color = [0.651, 0.485, 0.644, 1] # create GradientTexture node node_gradientTexture = nodes.new(type='ShaderNodeTexGradient') node_gradientTexture.location = (600,0) # create Mapping node node_mapping = nodes.new(type='ShaderNodeMapping') node_mapping.location = (200,0) node_mapping.rotation.x = math.pi/2 node_mapping.rotation.y = math.pi/2 # create TextureCoordinate node node_textureCoordinate = nodes.new(type='ShaderNodeTexCoord') node_textureCoordinate.location = (0,0) # link nodes links = mat.node_tree.links link = links.new(node_textureCoordinate.outputs[0], node_mapping.inputs[0]) link = links.new(node_mapping.outputs[0], node_gradientTexture.inputs[0]) link = links.new(node_gradientTexture.outputs[0], node_colorRamp.inputs[0]) link = links.new(node_colorRamp.outputs[0], node_diffuse.inputs[0]) link = links.new(node_diffuse.outputs[0], node_output.inputs[0]) text.data.materials.append(bpy.data.materials['gradient']) ``` The gradient is correctly rendered in v2.79 but is nearly monochrome (first color) with v2.79a

yokotsumo commented

2018-03-19 19:39:33 +01:00

Added subscriber: @YokoTsumo

Ray molenkamp commented

2018-03-19 19:40:51 +01:00

Added subscriber: @LazyDodo

Ray molenkamp commented

2018-03-19 19:40:51 +01:00

please attach a .blend file showing the issue.

Brecht Van Lommel commented

2018-03-19 19:58:05 +01:00

Added subscriber: @brecht

Brecht Van Lommel commented

2018-03-19 19:58:05 +01:00

Setting priority back to incomplete, please do attach a .blend file. I can't see any difference with a material created by this script.

Ray molenkamp commented

2018-03-19 20:00:08 +01:00

also run blender with --factory-startup parameter on both blender versions to rule out any local settings changes you may have done.

Ray molenkamp commented

2018-03-19 22:17:31 +01:00

We've asked twice now for a .blend file, please once you have run your script (preferably both in 2.79 and 2.79a) please hit file->save and save the file, then attach them both to this post.

Brecht Van Lommel commented

2018-03-19 22:28:39 +01:00

Changed status from 'Open' to: 'Archived'

Brecht Van Lommel closed this issue

2018-03-19 22:28:39 +01:00

Brecht Van Lommel self-assigned this 2018-03-19 22:28:39 +01:00

Brecht Van Lommel commented

2018-03-19 22:28:39 +01:00

I can reproduce the difference with the latest attached script, it's due to this bug fix: e7aad8f

The new behavior is the correct one though, it's not ideal that the texture mapping changed for text objects but that's what needed to be done to fix the bug.

I can reproduce the difference with the latest attached script, it's due to this bug fix: e7aad8f The new behavior is the correct one though, it's not ideal that the texture mapping changed for text objects but that's what needed to be done to fix the bug.

yokotsumo commented

2018-03-20 10:07:00 +01:00

And is it possible to get the same result with 2.79a as with 2.79? If so, what should be changed?

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Color rendered differently between v2.79 and v.79a #54364