Transform node troubles?

[ashkotal]

Fusion seems to apply a certain amount of motion blur to a layer, by default, even when the motion blur option is off. Causes trouble with the original grain quality of the plate. Has anyone noticed this while working?

[avillabon]

Actually this has never happened to me. Unless of course i have motion blur on for that node. I would advise you create a simple scene with two background nodes and one merge and then mask the fg layer and animate it with a transform node and then check to see if you are getting any motion blur. That experiment should prove if you are getting any motion blur when not checking the motion blur ticker.

Alex

[ShadowMaker SdR]

It's not motion blur. It's the result of sub-pixel render softening. Meaning that if you make a transform, the image can move less than 1 pixel, thereby softenig th e image as a result.

[DanielKoch]

Indeed. All compositors do sub-pixel sampling when positioning a layer with anything other than a whole-pixel offset.

Easiest way to avoid it in 5.21 is to turn the "Snap" toolbar button on when positioning your layer. That will snap anything you drag to the nearest pixel boundaries, and (assuming pixel aspects match etc) things should be as crisp as they ever were.