Unless I am missing something here, I don’t think multiplying by -1 with the math node is working for me in blender 2.74a. I expect the pixels’ value to be the same except for the sign if I multiply by -1. However, this is not what I get. For example, when I sampled the color of a pixel close to a value of 1 and then multiply by -1 I get -14. However, when I do the exact same thing in blender 2.63 I get the expected result.
multiply_prob.blend (508 KB)
Can anyone try this out for me on your computer?
Here is my rig:
CPU: Intel® Core™ i7-4770K @ 3.50GHz
RAM: 8gb
GFX: nVidia Geforce GTX 780 Ti
OS: Windows 8 64 bit
Drivers: 347.25
Blender: 2.74a