Dynamic Paint weight group isn't updated unless weight has been assigned #66835

New Issue

Leroy · 2019-07-13T04:05:42+02:00

Leroy commented

2019-07-13 04:05:42 +02:00

System Information
Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 388.13

Blender Version
Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-07-11 13:50, hash: 06312c6d2d
Worked: (optional)

Short description of error
if you worked in dynamic paint, and used weight mode, you will feel bothered, nothing will show in viewport. in 2.79x, you can preview the weight color, and easy used in modifier.

Exact steps for others to reproduce the error

Just download my .blend file, and play animation with space bar.

[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]
dp.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 388.13 **Blender Version** Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-07-11 13:50, hash: `06312c6d2d` Worked: (optional) **Short description of error** if you worked in dynamic paint, and used weight mode, you will feel bothered, nothing will show in viewport. in 2.79x, you can preview the weight color, and easy used in modifier. **Exact steps for others to reproduce the error** Just download my .blend file, and play animation with space bar. [Please describe the exact steps needed to reproduce the issue] [Based on the default startup or an attached .blend file (as simple as possible)] [dp.blend](https://archive.blender.org/developer/F7604519/dp.blend)

Leroy commented

2019-07-13 04:05:42 +02:00

Added subscriber: @Leroy-Xie

Nahuel Belich commented

2019-07-13 10:03:50 +02:00

Added subscriber: @NahuelBelich

Nahuel Belich commented

2019-07-13 10:03:50 +02:00

just test it just for curiosity, its not only a visualization issue, it doesn't seems to be working at all.
I just added a displace to the plane and masked it with the group, works in 2.79, i also try baking the vertex group, didn't work in 2.8

just test it just for curiosity, its not only a visualization issue, it doesn't seems to be working at all. I just added a displace to the plane and masked it with the group, works in 2.79, i also try baking the vertex group, didn't work in 2.8 ![imagen.png](https://archive.blender.org/developer/F7605070/imagen.png)

Leroy commented

2019-07-14 09:32:57 +02:00

@NahuelBelich I can't determine the running situation because I can't see it. I add the mask modifier, looks good, but displace modifier seems not work.

Sebastian Parborg commented

2019-07-15 12:28:03 +02:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2019-07-15 12:28:03 +02:00

The viewport display is a known limitation.

I can't reproduce the display modifier not working though. So you guys will have to be a bit more descriptive:
recording.mp4

The viewport display is a known limitation. I can't reproduce the display modifier not working though. So you guys will have to be a bit more descriptive: [recording.mp4](https://archive.blender.org/developer/F7610469/recording.mp4)

Fin O'Riordan commented

2019-07-15 16:04:02 +02:00

Added subscriber: @FinbarrORiordan

Fin O'Riordan commented

2019-07-15 16:44:17 +02:00

This issue is that the 'dp_weight' vertex group isn't working as expected in the modifier stack for most modifiers that take a vertex group input... I've found that if you assign a single vertex to the 'dp_weight' group it seems to initialize the group and everything works... you can even remove the vertex from the group and everything still works as expected...

version: 2.80 (sub 74), branch: master, commit date: 2019-07-11 13:50, hash: 06312c6d2d

This issue is that the 'dp_weight' vertex group isn't working as expected in the modifier stack for most modifiers that take a vertex group input... I've found that if you assign a single vertex to the 'dp_weight' group it seems to initialize the group and everything works... you can even remove the vertex from the group and everything still works as expected... version: 2.80 (sub 74), branch: master, commit date: 2019-07-11 13:50, hash: `06312c6d2d`

Sebastian Parborg self-assigned this 2019-07-15 17:05:47 +02:00

Sebastian Parborg changed title from ~~Don't show weight group when used Dynamic Paint [2.8]~~ to Dynamic Paint weight group isn't updated unless weight has been assigned

2019-07-15 17:37:17 +02:00

Sebastian Parborg commented

2019-07-15 18:42:30 +02:00

I've posed a potential fix: D5263

I've posed a potential fix: [D5263](https://archive.blender.org/developer/D5263)

Leroy commented

2019-07-16 05:47:39 +02:00

101.mp4
@ZedDB In my video, you can see, the dynamic is worked with mask and wireframe modifier, but nothing with displace modifier, it's Strangely.

[101.mp4](https://archive.blender.org/developer/F7612323/101.mp4) @ZedDB In my video, you can see, the dynamic is worked with mask and wireframe modifier, but nothing with displace modifier, it's Strangely.

blender-admin commented

2019-07-16 11:42:03 +02:00

This issue was referenced by c4a62493de

This issue was referenced by c4a62493de17cc5f8a87be719b0164d26851e721

Sebastian Parborg commented

2019-07-16 11:44:26 +02:00

Changed status from 'Open' to: 'Resolved'

Sebastian Parborg closed this issue

2019-07-16 11:44:26 +02:00

Fin O'Riordan commented

2019-07-16 14:10:22 +02:00

Thanks @ZedDB

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Dynamic Paint weight group isn't updated unless weight has been assigned #66835