No way to adjust the intensity of Opacity without enabling the texture

[evgvoronov]

Hi! Thank you for developing and sharing this awesome tool!

I have encountered a small problem. Because the Intensity attribute is connected to the True part of the switch node in MF_Opacity, there is no way to control the Intensity of the opacity without using a texture (which costs an extra texture lookup).

It might be beneficial to connect the Intensity attribute to the False part of the Switch node as well, to allow for better control.