Make sure to submit a full bug report, especially since you have a reproduce 
able example.

Scott

Sent from my iPad

On Mar 26, 2011, at 7:40 AM, Moritz Moeller <[email protected]> wrote:

> On 03/26/2011 01:21 AM, Scott Squires wrote:
>> I've seen this in some plugins I've built where there seems to be
>> a Nuke refresh issue resulting in some black like when viewing.
>> When rendering for Write though it seems to behave itself.
> 
> Yeah, but this is an issue in the case at hand. We convert the requested
> pixels to a mip-mapped texture on disk which is expensive.
> We omit re-conversion if the node hash is unchanged.
> Now what you get then is a black texture on disk.
> 
> The worst thing is that we can't even detect this. I.e. Row::is_zero()
> returns false on the channels we request, even though the data is all
> black. This makes sense since the Iop we request() is anything but black
> but the data we get back unfortunately is.
> 
> I can reproduce this now 100%. It happens when opening a script and
> requesting data from any Iop for the 1st time. The 2nd time is always fine.
> 
> Anyone from Foundry care to comment?
> 
> .mm
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