Hey

When one select some multilayer file (like exr or psd) in file browser  nuke 
goes through all layers: layer by layer, channel by channel nuke
allocate memory, decompress it etc, etc. In case of really big files, with many 
layers it can take long time. And it's all for nothing
because prewiew window shows only base RGB set. Additionaly: even if I just 
click on such a multilayer file to watch it, Nuke permanently
create tons of channels in my script. It can be irritating if one works with 
such files all the time.

So I have a question: is there way to distinc betwen "normal" usage of Reader 
and "file browser preview"? I guess there is no difference in
call to Reader constructor. But it would be great to find some way to disable 
multilayer support in file browser preview. 

Best
Adrian
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