Black and White Effect

In an attempt to create a temporary Black and White, ie. no colors on the screen, a friend has recommended that I use SetCineFilterEndUV. Does anyone have the expertise to address this issue?

native SetCineFilterEndUV takes real minu, real minv, real maxu, real maxv returns nothing

My experience on that native is zero, I recommend you to experiment with random values and see how them work

I think the best you can hope for is going to be a grey out that may not look so hot. I may be wrong but I have experimented with it before and never hit apon anything like what you seem to want.