Ramiro, I'm not an expert but here is what I've been happy with. I shoot 3 
bracketed images per tile and I tend to have 10-12 tiles total (360 
spherical pano). I load the images into hugin, then I create the stacks in 
the images tab. For each stack I run align-image-stack to find control 
points (lower-left pane of images tab), I use the following arguments to 
align_image_stack: -f %v -e -v -p %o -g 1 -i -c 1 -g 4 %i. I then select 
the best image of each stack and run cpfind to create control points across 
the tiles.

In one of the preview windows I ensure the EV is set to that of the 
brightest image so I don't get clipping. To stitch, I select "exposure 
fused from any arrangement" and jpeg (or tiff). This results in a 24-bit 
image that is automatically HDR-blended. It works well for me for sunset 
type of shots where the dynamic range needs to be compressed but isn't huge.

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