baking to low res textures with cycles produces artifacts (esp. gpu adaptive sampling) #95172

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lictex_ · 2022-01-24T10:38:35+01:00

lictex_ commented

2022-01-24 10:38:35 +01:00

System Information
Operating system: windows 10 21h2
Graphics card: nvidia geforce rtx 2070, studio driver 511.09

Blender Version
Broken: 3.0.0
Worked: (newest version of Blender that worked as expected)

Short description of error
baking to low res texture (sth. like 1024x1 px) not working as expected
context: i'm trying to bake some 1-dimension gradients into textures, and load them with external applications
expect: getting a smooth 1d gradient texture, like the ref below

bake.blend
result on:

cpu / gpu / cpu adaptive sampling: some constant artifacts. even with 1024x16 tex there're still some micro stutters if scale up the view
gpu adaptive sampling: random trashes, every bake produces a different result.
none of them really works well..

(btw gpu baking also outputs trashes time to time in my real scenes. restarting blender will temporarily solve it. since it's failing randomly i cannot get a reliable reproducing. this is possibly another topic tho)

Exact steps for others to reproduce the error

open .blend file
switch to proper cycles device
bake!

**System Information** Operating system: windows 10 21h2 Graphics card: nvidia geforce rtx 2070, studio driver 511.09 **Blender Version** Broken: 3.0.0 Worked: (newest version of Blender that worked as expected) **Short description of error** baking to low res texture (sth. like 1024x1 px) not working as expected context: i'm trying to bake some 1-dimension gradients into textures, and load them with external applications expect: getting a smooth 1d gradient texture, like the *ref* below ![image.png](https://archive.blender.org/developer/F12820763/image.png) [bake.blend](https://archive.blender.org/developer/F12820765/bake.blend) result on: - cpu / gpu / cpu adaptive sampling: some constant artifacts. even with 1024x16 tex there're still some micro stutters if scale up the view - gpu adaptive sampling: random trashes, every bake produces a different result. none of them really works well.. (btw gpu baking also outputs trashes time to time in my real scenes. restarting blender will temporarily solve it. since it's failing *randomly* i cannot get a reliable reproducing. this is possibly another topic tho) **Exact steps for others to reproduce the error** - open .blend file - switch to proper cycles device - bake!

lictex_ commented

2022-01-24 10:38:35 +01:00

Added subscriber: @lictex_1

Philipp Oeser commented

2022-01-24 11:18:33 +01:00

Added subscribers: @brecht, @lichtwerk

Philipp Oeser commented

2022-01-24 11:18:33 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Philipp Oeser commented

2022-01-24 11:18:33 +01:00

cpu / gpu / cpu adaptive sampling: some constant artifacts. even with 1024x16 tex there're still some micro stutters if scale up the view

I think this boils down to being the same as #81710 (Artifacts appear in texture bakes [stripe pattern]), workaround here is

In #81710#1249339, @brecht wrote:
It's a problem with long thin triangles, the workaround is to add a few loopcuts.

gpu adaptive sampling: random trashes, every bake produces a different result.

I am getting completely black results with this (this might have been reported before, will check for duplicates)

> cpu / gpu / cpu adaptive sampling: some constant artifacts. even with 1024x16 tex there're still some micro stutters if scale up the view I think this boils down to being the same as #81710 (Artifacts appear in texture bakes [stripe pattern]), workaround here is > In #81710#1249339, @brecht wrote: > It's a problem with long thin triangles, the workaround is to add a few loopcuts. --- > gpu adaptive sampling: random trashes, every bake produces a different result. I am getting completely black results with this (this might have been reported before, will check for duplicates)

Philipp Oeser commented

2022-01-24 11:33:03 +01:00

In #95172#1293788, @lichtwerk wrote:

gpu adaptive sampling: random trashes, every bake produces a different result.

I am getting completely black results with this (this might have been reported before, will check for duplicates)

#94355 (GPU+Adaptive sampling Bakes incomplete textures) might have the same roots

> In #95172#1293788, @lichtwerk wrote: >> gpu adaptive sampling: random trashes, every bake produces a different result. > I am getting completely black results with this (this might have been reported before, will check for duplicates) #94355 (GPU+Adaptive sampling Bakes incomplete textures) might have the same roots

Philipp Oeser changed title from ~~baking to low res textures with cycles produces artifacts~~ to baking to low res textures with cycles produces artifacts (esp. gpu adaptive sampling)

2022-01-24 11:33:16 +01:00

lictex_ commented

2022-01-24 16:26:54 +01:00

It's a problem with long thin triangles, the workaround is to add a few loopcuts.

this works, so it seems to be the same issue, sorry for the duplicate
and after trying hundreds of loop cuts, i found that simply subdivide the plane once works really well on this particular case...

for #94355

When I dont use texture coordinate, and I just use the material color, it bakes fine.

not works, either.

might still have same roots though, as i'm also getting random baking results with that file..

> It's a problem with long thin triangles, the workaround is to add a few loopcuts. this works, so it seems to be the same issue, sorry for the duplicate and after trying hundreds of loop cuts, i found that simply subdivide the plane once works really well on this particular case... for #94355 > When I dont use texture coordinate, and I just use the material color, it bakes fine. not works, either. ![image.png](https://archive.blender.org/developer/F12821275/image.png) might still have same roots though, as i'm also getting random baking results with that file..

Brecht Van Lommel commented

2022-01-24 19:27:37 +01:00

Closed as duplicate of #94355

Brecht Van Lommel closed this issue

2022-01-24 19:27:37 +01:00

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baking to low res textures with cycles produces artifacts (esp. gpu adaptive sampling) #95172