When loading an image that has a small scalar range (e.g., this MRHead image rescaled to 0.0-1.0 range) then Shift slider in volume rendering module has incorrect min/max range by default (very large range compared to the scalar range of the volume). The range is fixed when transfer functions are modified (e.g., any of the points are moved in scalar opacity transfer function).

Probably an initial update of the slider range is missing.

@cpinter could you have a look? You've fixed this and it almost works perfectly, it seems to be just a small initialization bug.

I tried with the file you provided and in the latest version it seems to be working fine. Or maybe I misunterstand the problem. What I did:

• Load the small scalar range MRHear
• Show in Volume rendering
• Move the Shift slider, see how the volume changes
• Load regular MRHead
• Show in Volume rendering
• Move the Shift slider, it is changing apparently exactly the same way as the small scalar range one

@lassoan You can close this if you experience the same.

@lassoan Can you take a look based on the latest here?

I cannot reproduce the problem anymore, so I guess the problem was fixed.