Cycles: Volumes in the world shader behave strangle with some textures #92027
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Reference: blender/blender#92027
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System Information:
Operating system: Linux-5.14.0-1-amd64-x86_64-with-glibc2.32 64 Bits
Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 470.63.01
Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-10-07 19:35, hash:
23791db145
, and every version between master at 2.81 (That is how far I tested).Worked: Unsure
Short description of error:
When using certain procedural textures in the volume output of the world shader in Cycles, you get unexpected results.
Exact steps for others to reproduce the error:
World
shader and delete theBackground
node.World Shader
add aMagic Texture
node and connect one of the outputs to theVolume
socket on theWorld Output
node.Magic Texture
is projecting light onto objects in the scene, but you can't see theMagic Texture
directly.Color Ramp
node between theMagic Texture
and theWorld Output
nodes. Now you can see theMagic Texture
in the viewport.Another test:
World
shader and delete theBackground
node.Noise Texture
node and connect an output to theVolume
socket on theWorld Output
node.Noise Texture
is having on the scene, but you can't see theNoise Texture
Color Ramp
between theNoise Texture
and theWorld Output
nodes. You still can't see theNosie Texture
in the scene.Volume Scatter
node in theWorld Shader
, connecting the output to theVolume
socket on theWorld Output
node and connect the output of theColor Ramp
node to theDensity
input of theVolume Scatter
node. You can now see the noise texture in the volume if you have a light in your scene.Color Ramp
node and drag it closer to the position0.5
. You will see the results you expect until you reach the position0.5
where the volume will seem to disappear from your scene. Yet when you look at objects in the scene, the light reaching them is still affected by a volume shader you can't see.Here's a video demonstrating this:
Volumetrics not visibile in viewport in certain sitautions.mp4
Added subscriber: @Alaska
For anyone wanting to triage this report: I just thought I would add that I have tested this again and can still reproduce it on the latest master
Added subscriber: @PratikPB2123
Changed status from 'Needs Triage' to: 'Confirmed'
@Alaska , Neither ColorRamp node shows texture in viewport (on current master).
In 3.0.0 it works as you said. Not tested on intermediate build (will do that later)
I can confirm this in the latest master.