Thomas Dinges (dingto)
Cycles developer

Projects (7)

User Details

User Since
Aug 31 2008, 5:42 PM (468 w, 1 d)

Recent Activity

Thu, Aug 3

Thomas Dinges (dingto) added a comment to D2768: Cycles: remove square samples option..

Sounds reasonable. :)

Thu, Aug 3, 3:20 PM
Thomas Dinges (dingto) added a comment to D2764: Code refactor: use float4 instead of intrinsics for CPU denoise filtering..

Just some note about SSE2/3 in general, I think we can deprecate these soon (especially for 2.8x). Of course we still need a non SIMD Kernel for other architectures, but every computer that runs 2.8x should be modern enough to have SSE4 as well.

Thu, Aug 3, 2:35 PM
Thomas Dinges (dingto) accepted D2768: Cycles: remove square samples option..

Don't think I will miss this, so fine with me. Just wondering if this (alongside your other UI / settings changes) is meant for 2.7x still or for 2.8x?

Thu, Aug 3, 2:28 PM
Thomas Dinges (dingto) accepted D2767: Cycles: remove option to disable transparent shadows globally..
Thu, Aug 3, 2:26 PM

Jun 14 2017

Thomas Dinges (dingto) added a comment to D2708: Cycles: Use correct multisample MIS model for branched path tracing.

Nice work Lukas!

Jun 14 2017, 11:42 AM

May 19 2017

Thomas Dinges (dingto) added a comment to D2679: Cycles: discard unused Principled BSDF inputs at shader compile time..

Don't think we need the extra _fac variants in constant fold. We can just use is_one and is_zero?

May 19 2017, 1:20 PM

Apr 27 2017

Thomas Dinges (dingto) committed rBa00f54332da1: Cleanup: Some style and code tweaks to Image Code after changes. (authored by Thomas Dinges (dingto)).
Cleanup: Some style and code tweaks to Image Code after changes.
Apr 27 2017, 11:12 AM

Apr 26 2017

Thomas Dinges (dingto) accepted D2650: Unlimited number of textures for Cycles.

Looks good to me then. :) We could only get half textures working on Fermi, if we take some of the float4 slots and make them half4 ones, but I wouldn't bother.

Apr 26 2017, 10:30 PM
Thomas Dinges (dingto) requested changes to D2650: Unlimited number of textures for Cycles.
Apr 26 2017, 4:55 PM
Thomas Dinges (dingto) added a comment to D2650: Unlimited number of textures for Cycles.

In general looks fine. Should be a first step towards easier code in this area. Once we can drop Fermi fully (as soon as nvidia drops it with CUDA 9), we can simplify it even further and get rid of the special cases.

Apr 26 2017, 4:52 PM
Thomas Dinges (dingto) edited reviewers for D2650: Unlimited number of textures for Cycles, added: Cycles; removed: Brecht Van Lommel (brecht), Lukas Stockner (lukasstockner97), Mai Lavelle (maiself), Sergey Sharybin (sergey).
Apr 26 2017, 4:32 PM
Thomas Dinges (dingto) added a comment to D2650: Unlimited number of textures for Cycles.

Please always assign entire Cycles project as Reviewers. I refactored most of the image code last year, so I'd like a chance to check on the proposed changes here too. Quite busy atm, but will check in the coming days.

Apr 26 2017, 4:31 PM

Apr 3 2017

Thomas Dinges (dingto) accepted D2595: [Cycles/msvc] Get cycles_kernel compile time under control..

Thank you for changing it, I prefer code readability and the ability to quickly debug stuff there over some very small speedup. :)

Apr 3 2017, 3:46 PM · Cycles
Thomas Dinges (dingto) requested changes to D2595: [Cycles/msvc] Get cycles_kernel compile time under control..

I don't see why you changed the if/else to switch statements, you said that the matrix inlining is responsible for the slow compilation?

Apr 3 2017, 1:58 PM · Cycles

Mar 28 2017

Thomas Dinges (dingto) accepted D2586: Cycles: Make all #include statements relative to cycles source directory.

I don't see an issue with this approach, fine with it.

Mar 28 2017, 8:50 PM

Mar 27 2017

Thomas Dinges (dingto) committed rB6a5e92c0222b: Cleanup: Use upper case consistently in adaptive feature compile logging. (authored by Thomas Dinges (dingto)).
Cleanup: Use upper case consistently in adaptive feature compile logging.
Mar 27 2017, 10:53 PM
Thomas Dinges (dingto) committed rB7a65f9b1716f: Cleanup: Resolve todo in CUDA voxel image code. (authored by Thomas Dinges (dingto)).
Cleanup: Resolve todo in CUDA voxel image code.
Mar 27 2017, 10:37 PM
Thomas Dinges (dingto) committed rB0df33cc52d20: Cycles UI: Avoid abreviation for Hair Extension. (authored by Thomas Dinges (dingto)).
Cycles UI: Avoid abreviation for Hair Extension.
Mar 27 2017, 10:00 PM
Thomas Dinges (dingto) committed rB0cfc557c5d20: Cycles: Move Shadow Catcher UI option next to Ray Visibility. (authored by Thomas Dinges (dingto)).
Cycles: Move Shadow Catcher UI option next to Ray Visibility.
Mar 27 2017, 9:53 PM

Mar 21 2017

Thomas Dinges (dingto) added a comment to T51019: Low FPS in new versions.

Please write your report in English.

Mar 21 2017, 10:43 AM · BF Blender
Thomas Dinges (dingto) accepted D1788: Cycles: Experiment with shadow catcher.

Read through the code quickly, looks good to me. Just found one little code style issue. :)

Mar 21 2017, 9:58 AM

Mar 19 2017

Thomas Dinges (dingto) closed T50997: Schrift verändert sich! as "Invalid".

This is not a valid bug report. Please ask in a Blender forum for user help!

Mar 19 2017, 12:44 PM · BF Blender

Mar 1 2017

Thomas Dinges (dingto) accepted rB49c99549eb19: Cleanup: Use .enabled instead of .active.

Thanks for fixing the comment.

Mar 1 2017, 8:29 PM
Thomas Dinges (dingto) raised a concern with rB49c99549eb19: Cleanup: Use .enabled instead of .active.

Please be more precise when changing such things, how is that a cleanup? Also the comment still mentions ".active" which is now meaningless after the change.

Mar 1 2017, 7:55 PM

Feb 18 2017

Thomas Dinges (dingto) updated subscribers of T50700: Possible NaNs with refractive BSDF.

Doesn't look like a bug, just reflections from the lamp. Disable MIS for the lamp and the birght spots go away.

Feb 18 2017, 10:38 PM · BF Blender, Cycles
Thomas Dinges (dingto) closed T50711: OpenCL build on render fails on "Compiling OpenCL program split_direct_lighting" as "Invalid".

Correct, we only support HD 7000 cards and above with GCN architecture.

Feb 18 2017, 11:31 AM · BF Blender

Feb 17 2017

Thomas Dinges (dingto) awarded D2513: Cycles: Speed up by avoiding extra calulations when unneeded a Like token.
Feb 17 2017, 4:12 PM

Feb 4 2017

Thomas Dinges (dingto) edited reviewers for D2499: procedural textures - lyapunov and mandelbulb fractals, added: Cycles; removed: Thomas Dinges (dingto).
Feb 4 2017, 10:43 PM · Cycles, BF Blender

Jan 28 2017

Thomas Dinges (dingto) triaged T50545: cycles render error as "Incomplete" priority.

We expect clear instructions and if possible a blend file showcasing the issue, as clearly outlined in our bug report guidelines.

Jan 28 2017, 12:10 PM · BF Blender

Jan 20 2017

Thomas Dinges (dingto) committed rBff1b850081b0: Fix T50460. Greying out issue with Cycles culling options. (authored by Thomas Dinges (dingto)).
Fix T50460. Greying out issue with Cycles culling options.
Jan 20 2017, 10:58 AM
Thomas Dinges (dingto) closed T50460: Cycles cull option ui problem as "Resolved" by committing rBff1b850081b0: Fix T50460. Greying out issue with Cycles culling options..
Jan 20 2017, 10:58 AM · User Interface, Cycles, BF Blender
Thomas Dinges (dingto) committed rB05ff32bd250d: Fix compile error (-Werror=float-conversion). (authored by Thomas Dinges (dingto)).
Fix compile error (-Werror=float-conversion).
Jan 20 2017, 10:51 AM
Thomas Dinges (dingto) added a comment to T50460: Cycles cull option ui problem.

I don't see how this is an underlying issue with the layout engine. Using a .active or .disabled tag, assigned to a certain layout block will affect all of its assigned properties. So using two different UI blocks is a proper fix.

Jan 20 2017, 10:37 AM · User Interface, Cycles, BF Blender

Jan 14 2017

Thomas Dinges (dingto) added a comment to D2348: Cycles: Refactor split kernel and implement for CPU.

I would not scatter Cycles development at this point, either we move all Cycles development to the 2.8 branch (which I wouldn't do just yet) or we stick to master. Putting some things into the branch while keeping maintenance and smaller changes in master will only ask for trouble later. Also we still have a few months until a 2.79 release, enough time to fix issues when they come up.

Jan 14 2017, 3:16 PM

Jan 6 2017

Thomas Dinges (dingto) added a comment to D2441: [Cycles] Add rounded corners to brick texture. .

I don't see this as a new texture or special case, more as a reasonable improvement to an already implemented procedural texture.

Jan 6 2017, 11:57 AM

Jan 3 2017

Thomas Dinges (dingto) accepted D2441: [Cycles] Add rounded corners to brick texture. .

I tested the patch quickly, works nicely. LGTM from my side. Thanks for the addition!

Jan 3 2017, 6:45 PM
Thomas Dinges (dingto) added inline comments to D2441: [Cycles] Add rounded corners to brick texture. .
Jan 3 2017, 8:29 AM

Jan 2 2017

Thomas Dinges (dingto) added inline comments to D2441: [Cycles] Add rounded corners to brick texture. .
Jan 2 2017, 10:33 PM
Thomas Dinges (dingto) added a reviewer for D2441: [Cycles] Add rounded corners to brick texture. : Thomas Dinges (dingto).

Nice addition!

Jan 2 2017, 10:29 PM

Dec 27 2016

Thomas Dinges (dingto) added a comment to T50268: Cycles allows to select un supported GPUs for OpenCL.

We explicitly white list certain OpenCL configurations, not sure we differentiate correctly on OSX though.

Dec 27 2016, 8:29 PM · Cycles, BF Blender
Thomas Dinges (dingto) closed T50268: Cycles allows to select un supported GPUs for OpenCL as "Archived".

Intel GPUs are not officially supported yet for Cycles rendering. This might change in the future, with various split kernel improvements, but for now it's a known limitation.

Dec 27 2016, 8:14 PM · Cycles, BF Blender

Dec 26 2016

Thomas Dinges (dingto) added a comment to T50309: Renderman v21.2 settings in cycles.

Do you have a Renderman addon enabled? Disable it and it should be fine. If you use a vanilla Blender build without addon it works fine.

Dec 26 2016, 7:56 PM · BF Blender
Thomas Dinges (dingto) closed T50327: SPAM as "Invalid".
Dec 26 2016, 7:53 PM
Thomas Dinges (dingto) closed T50326: SPAM as "Invalid".
Dec 26 2016, 7:53 PM
Thomas Dinges (dingto) renamed T50314: SPAM from "Supporting call $$ 1~800+204-4122$$$$ TOSHIBA printer customer Support phone number usa Call" to "SPAM".
Dec 26 2016, 7:50 PM
Thomas Dinges (dingto) renamed T50315: SPAM from "WirLESS pRiNter $$+18002044122 ++ LEXMARK printer customer SErVice phone number" to "SPAM".
Dec 26 2016, 7:50 PM
Thomas Dinges (dingto) renamed T50316: SPAM from "WirLESS pRiNter $$+18002044122 ++ KODAK printer customer SErVice phone number" to "SPAM".
Dec 26 2016, 7:49 PM
Thomas Dinges (dingto) renamed T50317: SPAM from "contact number $$$$18002044122 $$$$HPtech support customer service number helpline number" to "SPAM".
Dec 26 2016, 7:49 PM
Thomas Dinges (dingto) renamed T50318: SPAM from "DDLJ ♥@@Canada 18002044122 FREE CANONsupport number, CANONsupport, Aol" to "SPAM".
Dec 26 2016, 7:49 PM
Thomas Dinges (dingto) renamed T50320: SPAM from "contact number 18002044122 MAC APPLE tech support customer service number helpline number" to "SPAM".
Dec 26 2016, 7:48 PM
Thomas Dinges (dingto) renamed T50321: SPAM from "contact number 18002044122 PANASONIC tech support customer service number helpline number" to "SPAM".
Dec 26 2016, 7:48 PM
Thomas Dinges (dingto) renamed T50325: SPAM from "LEXMARK:>> Call USA**** 18002044122@@ LEXMARKprinter tech support phone number usa" to "SPAM".
Dec 26 2016, 7:48 PM
Thomas Dinges (dingto) renamed T50323: SPAM from "++**D ~Support ***1~800~204~4122** LEXMARK printer Customer SUPPORT phone number, " to "SPAM".
Dec 26 2016, 7:47 PM
Thomas Dinges (dingto) renamed T50319: SPAM from "contact number 18002044122 EPSONtech support customer service number helpline number" to "SPAM".
Dec 26 2016, 7:47 PM
Thomas Dinges (dingto) renamed T50324: SPAM from "C@ll U$$D ***$$ 18002044122 \\\\\\$*** LEXMARKprinter tech support phone number usa " to "SPAM".
Dec 26 2016, 7:46 PM
Thomas Dinges (dingto) renamed T50322: SPAM from "@@Canada 18002044122 FREE XEROXsupport number, XEROXsupport, Aol" to "SPAM".
Dec 26 2016, 7:46 PM
Thomas Dinges (dingto) added a comment to T50322: SPAM.

Please edit the content of such reports to "SPAM" or whatever too, so the content disappears.

Dec 26 2016, 7:45 PM
Thomas Dinges (dingto) renamed T50326: SPAM from "Tech Support $$18002044122 ####### TOSHIBA printer customer Support phone number usa Call " to "SPAM".
Dec 26 2016, 7:45 PM
Thomas Dinges (dingto) renamed T50327: SPAM from "((1~800~204~4122)}}}})Samsung printer support phone number, Samsung printer support phone" to "SPAM".
Dec 26 2016, 7:44 PM

Dec 24 2016

Thomas Dinges (dingto) added a comment to T50292: SSS + Win10-64bit + gtx1070.

Try lowering the sub samples (Diffuse, SSS). That might help.

Dec 24 2016, 12:04 AM · BF Blender

Dec 23 2016

Thomas Dinges (dingto) renamed T50298: <WAS SPAM> from "Tech service Support $$448002605606 ++++ TOSHIBA printer customer Support phone number usa Call" to "SPAM".
Dec 23 2016, 10:03 PM

Dec 14 2016

Vincent Olivier (up4) awarded T38279: Improve Cycles standalone a Like token.
Dec 14 2016, 1:36 AM · BF Blender, Cycles

Dec 8 2016

Thomas Dinges (dingto) added a comment to D2406: Cycles: Experiment with cutout object.

Idea and code looks good to me. :) Having this as a closure seems good, more intuitive than adding yet another UI checkbox to object/mesh data settings imo.

Dec 8 2016, 4:12 PM
Thomas Dinges (dingto) requested changes to D2399: Cycles: Expose diffuse and glossy depth to Light Path node.

Easy to add now, much better than before my refactor, which made PathState available to SVM directly. :)

Dec 8 2016, 9:36 AM
Thomas Dinges (dingto) added a comment to T50193: Cycles renders volumetrics very differently on CPU vs. GPU.

Decoupled Ray Marching for homogeneous volumes should work on GPU (when enabled via ifdefs of course), but when I tested that, it wasn't stable. For heterogenous volumes, the current code uses dynamic mem alloc, which is slow on GPU and was giving me mem errors. That was 1-2 years ago though, situation might have changed.

Dec 8 2016, 9:33 AM · BF Blender, Cycles

Nov 29 2016

Thomas Dinges (dingto) edited the description of T50134: Rendering.
Nov 29 2016, 12:16 PM · Animation
Thomas Dinges (dingto) triaged T50134: Rendering as "Incomplete" priority.

We need a clear way to reproduce the issue, with an example blend file. Also, 2.77a is old, please try the 2.78a release. Also, are you on Windows, Linux, Mac?

Nov 29 2016, 12:15 PM · Animation

Nov 26 2016

Thomas Dinges (dingto) closed T50114: Open GL 2.1 as "Invalid".

Seems you run an old and unsupported GPU/driver. There is nothing we can do to fix this.

Nov 26 2016, 3:48 PM · BF Blender

Nov 14 2016

Thomas Dinges (dingto) awarded rBb047d79871ce: Cycles: De-duplicate image loading functions a Like token.
Nov 14 2016, 2:14 PM

Nov 7 2016

Thomas Dinges (dingto) committed rB99127925642b: Forgot this in last commit. (Brick GLSL). (authored by Thomas Dinges (dingto)).
Forgot this in last commit. (Brick GLSL).
Nov 7 2016, 8:59 PM
Thomas Dinges (dingto) committed rB28639a22bcba: Fix Brick Texture GLSL, broken after Mortar Smooth addition. (authored by Thomas Dinges (dingto)).
Fix Brick Texture GLSL, broken after Mortar Smooth addition.
Nov 7 2016, 8:55 PM

Oct 20 2016

Thomas Dinges (dingto) added a comment to D2313: Cycles Disney BRDF.

Thanks for submitting the patch. Haven't tested it yet, but some comment about code style. That should be fixed in all places.

Oct 20 2016, 11:38 PM · Cycles

Oct 17 2016

Thomas Dinges (dingto) added a comment to D2299: Cycles: OpenCL 3d textures.

OpenCL split kernel doesn't support volume rendering yet.

Oct 17 2016, 2:14 PM

Oct 14 2016

Thomas Dinges (dingto) renamed T49705: Removed SPAM from "USA$$U$$*****++++ I8008506928 +++********Epson printer tech support phone number usa Call" to "Removed SPAM".
Oct 14 2016, 9:21 PM
Thomas Dinges (dingto) added a comment to D2299: Cycles: OpenCL 3d textures.

Haven't tested the patch but code looks ok to me. Nice work! Have you tested this with both Mega and Split OpenCL kernel?

Oct 14 2016, 1:47 PM

Oct 13 2016

Thomas Dinges (dingto) closed T49642: OSL shader metadata and widget's not showing as "Archived".

Hi,
we don't support OSL metadata yet, that has never been implemented. It's a known (low priority) todo.

Oct 13 2016, 12:44 PM · BF Blender, Cycles

Oct 12 2016

Thomas Dinges (dingto) added a comment to D2132: Enable Cycles Sky Texture in OpenGL viewport.

I am against putting this into e.g. extern/. It's part of Cycles SVM/OSL shading system and we should not start outsourcing such things here imho. Then I'd rather have these files twice in the source tree (once Cycles, once GLSL).

Oct 12 2016, 7:01 PM · OpenGL / Gfx, Cycles

Oct 10 2016

Thomas Dinges (dingto) added a comment to T49620: Grey scene when rendering with OpenCL.

Blender 2.78 is out, please update to the latest version and try again.

Oct 10 2016, 6:52 PM · Cycles, BF Blender

Oct 8 2016

Thomas Dinges (dingto) closed T49606: Cycles Hair Rendering panel is in the Particle System properties, even though it's a scene property as "Archived".

This bugtracker is for bugs only, and the above mentioned behavior has been a design decision, and therefore works as intended.

Oct 8 2016, 1:12 PM · User Interface, BF Blender

Oct 7 2016

Thomas Dinges (dingto) added a comment to T49603: Blender/Cycles 2.78 CUDA error on Jetson-TX1.

My bad. Thanks Julian!

Oct 7 2016, 10:00 PM · BF Blender, Cycles
Thomas Dinges (dingto) added projects to T49603: Blender/Cycles 2.78 CUDA error on Jetson-TX1: BF Blender: 2.8, Cycles.

Not sure we do support Tegra devices. @Sergey Sharybin (sergey) @Brecht Van Lommel (brecht) ?

Oct 7 2016, 8:17 PM · BF Blender, Cycles
Thomas Dinges (dingto) added a comment to T49602: Selection for GPUs to render.

Hey,
It will happen when some developer picks it up and implements it. :)

Oct 7 2016, 8:11 PM
Thomas Dinges (dingto) closed T49602: Selection for GPUs to render as "Archived".

This is a known todo, and has been requested many times already in various places. :) We will tackle it at some point.

Oct 7 2016, 7:51 PM
Thomas Dinges (dingto) triaged T49604: Cycles Render Engine - inconsistent Math Node values as "Incomplete" priority.

"Based on a (as simple as possible) attached .blend file with minimum amount of steps" is missing.

Oct 7 2016, 7:48 PM · BF Blender

Oct 5 2016

Thomas Dinges (dingto) closed T49572: Not poping up as "Invalid".
Oct 5 2016, 12:02 AM · BF Blender

Oct 2 2016

Thomas Dinges (dingto) added a comment to T49530: Blender 2.78 cannot open this older Blend.

Opens fine here with a master build and 2.78 release on Linux.

Oct 2 2016, 12:24 PM · BF Blender
Thomas Dinges (dingto) triaged T49528: Brightness difference between CPU and GPU rendering with HDR Lightning as "Incomplete" priority.

The HDR texture is missing in the blend file.

Oct 2 2016, 11:48 AM · Cycles, Rendering, BF Blender

Oct 1 2016

Thomas Dinges (dingto) added a comment to T49522: installer doesn't create blender icon on desktop.

Do you get asked during installation if you want to create a Desktop Icon, did you check this?

Oct 1 2016, 4:25 PM · Platform: Windows, BF Blender

Sep 30 2016

Thomas Dinges (dingto) added a comment to T38279: Improve Cycles standalone.

Hi Bob, these sound great. You can upload patches here https://developer.blender.org/differential/diff/create/ then we can check on the work and possibly include it.

Sep 30 2016, 9:04 AM · BF Blender, Cycles

Sep 25 2016

Thomas Dinges (dingto) added a reviewer for D2254: 20% to 140% Speedup for the OpenCL kernel: Thomas Dinges (dingto).
Sep 25 2016, 8:31 AM

Sep 21 2016

Thomas Dinges (dingto) added a comment to T49411: Multiscatter GGX problem when the Roughness is zero.

That's not the case, at least not when we use Filter Glossy (see e.g. GlassBsdfNode::simplify_settings). So in case of a non sharp closure, in combination with Filter Glossy, the closure isn't changed.

Sep 21 2016, 10:06 AM · Cycles, BF Blender

Sep 19 2016

Thomas Dinges (dingto) added a comment to D2246: Cycles: Remove all structure-of-array features.

Happy to see ccl_fetch go away. Can run some tests on my Geforce 730 tomorrow! Nice work!

Sep 19 2016, 8:07 PM

Sep 17 2016

Thomas Dinges (dingto) updated subscribers of T49380: Cycles render preview doesn't respect object's render visibility.

Adding Julian (UI team) and Sergey (Cycles dev) for further feedback.

Sep 17 2016, 11:24 AM · Rendering, Cycles, BF Blender
Thomas Dinges (dingto) closed T49380: Cycles render preview doesn't respect object's render visibility as "Invalid".

We can make this more clear maybe, but it's still not considered a bug.

Sep 17 2016, 10:54 AM · Rendering, Cycles, BF Blender

Sep 16 2016

Thomas Dinges (dingto) closed T49380: Cycles render preview doesn't respect object's render visibility as "Invalid".

In order to hide this object in the viewport render, you have to toggle the eye icon in the outliner. And the "Only Render" setting you highlighted is for OpenGL only.

Sep 16 2016, 6:51 PM · Rendering, Cycles, BF Blender

Sep 7 2016

Thomas Dinges (dingto) closed T49279: Discrepancy between CPU and GPU rendering of Volumetrics as "Archived".

We run different algorithms for Volume rendering on CPU and GPU, GPUs do not support the improved decoupled ray marching sampling. This is a known todo and not considered a bug atm.

Sep 7 2016, 10:02 PM · Cycles, BF Blender
Thomas Dinges (dingto) added a comment to T49278: Windows7 gtx 1070- runing blender 2.78RC forcing windows to change composition scheme.

But then, RC1 should work as it has this fix?

Sep 7 2016, 10:47 AM · BF Blender
Thomas Dinges (dingto) added a comment to T49278: Windows7 gtx 1070- runing blender 2.78RC forcing windows to change composition scheme.

Please don't mix issues into one report, that makes it difficult to troubleshot.

Sep 7 2016, 10:15 AM · BF Blender

Sep 4 2016

Thomas Dinges (dingto) raised the priority of T49244: Adaptive subdivision with external displacement map fail from "Incomplete" to "Normal".
Sep 4 2016, 3:59 PM · Cycles, BF Blender
Thomas Dinges (dingto) triaged T49244: Adaptive subdivision with external displacement map fail as "Incomplete" priority.

Please follow the bug submission guidelines and attach a blend file and the texture that you use here, so we can easily reproduce the issue.

Sep 4 2016, 12:20 PM · Cycles, BF Blender