I am using autodesk smoke 2015 with R3D footage. It shows the resolution of the footages are half HD but I am sure those are 4K footages.
And if I change the resolution to HD in import, the quality is bad, just like blow up from half HD to HD.
How can I fix it?
There's a tab in the FX called Pre-Processing - if you change the Debayering setting, it will change the resolution of the clip.
This is also in the Media Hub's "Format Specific Options" for R3D - if you are previewing the source from the media hub, you can see the clip resolution change based on that setting - full will give you every pixel at 4k or 5k, half or quarter or either will make much smaller images.