I have been using Seg3D  for a while now (excellent program), however, as I begin to use more of its capabilities, this problem has arose. 

I am importing a stack of tiffs (380 tiffs...approx 200x200 pixels...1.3 kb each).  I am able to scroll through the original image stack fine (Fig 1 attached). 

However, when i begin to mask the images...scrolling through the images (with the masks) the rendering becomes jumbled (Fig. 2).  This is extremely inconvenient, especially when trying to use the paintbrush to amend the masks...

Has this problem occurred prior? and is there any way of improving the graphics memory?

Thanks

Tom M

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