P: Updating process in LR4 unexpectedly zeroes out exposure brush value.

Perhaps I did not express it clearly enough: I think the OPs problem is not specifically related to the brush. Instead, there is a more general underlying problem with all values that now have new PV2012-counterparts. This *includes* the brush's exposure.

The OP did not mention a global exposure.

IMHO it is exactly the same topic. You can exchange "exposure" with "a brush with exposure". Both my example and the OPs example are symptoms of the same underlying problem.

P.S. I will try to reproduce the OPs example with normal exposure.

EDIT: I reproduced the OPs problem using brush, global exposure and clarity. In general, all settings that now have different PV2010- and PV2012-values are affected.

EDIT 2: But I wonder why you cannot reproduce it. My system is Win 7 64 Bit with LR 4.1.

LRUSER24. I am guessing this is probably a different topic as it doesn't involve adjustment brushes.

I can duplicate your behavior steps but not the original poster's

It's a general problem, not just exposure brush. I can reproduce it using a similar approach using a single photo:

1. Reset a photo to Adobe defaults
2. Copy settings - select only the process version (which is PV2012 now)
3. Set PV to 2010
4. Set PV2010 exposure to e.g. +3
5. Paste settings

Expected behaviour: Exposure remains on +3 (or at least converted to similar PV2012 value)
Actual behaviour: Exposure is reset to zero

It is a general problem that also happens when syncing or applying a preset: When pasting, syncing or applying a preset containing PV2012 to a PV2010 photo, there is no automatic conversion to PV2012. Instead, the previously assigned PV2012-values appear. Automatic conversion is only possible via "!" button or using the calibration panel when switching to PV2012. I don't know whether this is intended or a bug. I would think bug.

What I mean by "previously assigned" can be shown as follows:

1. Reset a photo to Adobe defaults
2. Copy settings - select only the process version (which is PV2012 now)
3. Set PV2012 exposure to e.g. -3
4. Set PV to 2010
5. Set PV2010 exposure to e.g. +3
6. Paste settings

Expected behaviour: Exposure remains on +3
Actual behaviour: Exposure is reset to -3, which was the previously used value in PV2012.

IMHO this is a big conceptual problem how LR handles different process versions in copy/paste, sync and presets. It looks like this was not thought through completely. This problem makes every copy/paste, sync and preset operation completely unpredictable when the PV is changed and *not* all PV-specific settings are copied, too.

So did I, Rory.

There is either a subtle step that I am missing or we have another issue.

I am on win 7 and LR 4.1. In step 4 I synced with another image that was V2012.

Rory

I just tried it on a second Win 7 machine here and it is working properly. For Stephan and Rory,

Are you on LR 4.1?
did you leave out a step in your 4 step example?

Hi Stephen

I am able to reproduce your behavior. This does indeed appear to be a bug.

Rory

I followed your steps but it works fine here. The adjustment remains intact on Image 1. Tested on Win 7 64 and Mac 10.6.8. Canon 5DMKII Converted to DNG

The only way I can make it disappear is to select both PV and Local Adjustments in the Sync Settings operation. PV version alone will not do it.

I cannot duplicate your results.