ColoRamp value change from 0.501 to higher value results in slowdown and shading error #65944

Closed
opened 2019-06-20 04:37:30 +02:00 by Valera Barashkov · 3 comments

System Information
Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.86

Blender Version
Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-06-19 18:29, hash: d30f72dfd8
Worked: (optional)

Short description of error
ColoRamp value change from 0.501 to 0.502 as input to density results in slowdown and shading error for Principled Volume Shader.

Exact steps for others to reproduce the error
Open attached .blend
Change viewport to Rendered
Change ColoRamp from 0.501 to a higher value
Render speed is dramatically reduced and Volume Shader is incorrectly much brighter

ColorRamp bug.blend

**System Information** Operating system: Windows-10-10.0.17763 64 Bits Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.86 **Blender Version** Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-06-19 18:29, hash: `d30f72dfd8` Worked: (optional) **Short description of error** ColoRamp value change from 0.501 to 0.502 as input to density results in slowdown and shading error for Principled Volume Shader. **Exact steps for others to reproduce the error** Open attached .blend Change viewport to Rendered Change ColoRamp from 0.501 to a higher value Render speed is dramatically reduced and Volume Shader is incorrectly much brighter [ColorRamp bug.blend](https://archive.blender.org/developer/F7316205/ColorRamp_bug.blend)

Added subscriber: @valera-8

Added subscriber: @valera-8
Brecht Van Lommel was assigned by Jacques Lucke 2019-06-20 17:51:52 +02:00
Brecht Van Lommel was unassigned by Dalai Felinto 2019-12-23 16:34:03 +01:00

Added subscriber: @brecht

Added subscriber: @brecht
Philipp Oeser removed the
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Render & Cycles
label 2023-02-09 14:00:29 +01:00

I cannot confirm this in Blender 4.1. The rendertime is even better, since with a higher color ramp value there is less volume density. Also cannot observe a difference in brightness.

I cannot confirm this in Blender 4.1. The rendertime is even better, since with a higher color ramp value there is less volume density. Also cannot observe a difference in brightness.
Blender Bot added
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Archived
and removed
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Confirmed
labels 2024-03-07 14:32:30 +01:00
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Reference: blender/blender#65944
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