Understanding Min Max Rates

From VrayWiki

The Min/Max rates of the irradiance map is directly related to the final resolution of the render.

The Min setting is the first pass of the irradiance map calculation. The Max setting is the last pass of the irradiance map calculation.

With a Min setting of 0 and a Max setting of 3 The result will be 3 passes (or refinements) of the irradiance map.

Now, knowing what to set these to is completely dependent on resolution, and quality needed.

What exactly does the numbers mean? The number represents the sub-division of the pixels. The Min/Max rates of the irradiance map is directly related to the final resolution of the render.

The Min setting is the first pass of the irradiance map calculation. The Max setting is the last pass of the irradiance map calculation.

With a Min setting of 0 and a Max setting of 3 The result will be 3 passes (or refinements) of the irradiance map.

Now, knowing what to set these to is completely dependent on resolution, and quality needed.

What exactly does the numbers mean? The number represents the sub-division of the pixels. (This is my interpetation of it, im sure there is a proper method to explain it, and i will research more) The formulas are: When Rate is negitive: (Px*S)*(S/2) = Rs Where: Px = Pixels (in the shortest direction) S = Setting Rs = Resulting subdivision

So, if you have a image of 100px, and a rate of -1, you can then put that into the formula and will notice that you get a 50pixel irradiance map. (100*(-1)*(-1/2)= 50

When Rate is Positive: Px * 2S = Rs