BrianF

How do i change the area size jit.altern effects? if i want it to effect a certain area of the jit.pwindow how would i go about this? i would also like to be able to change the boarder parameters of the effect...to give the area effected shape...any thoughts would be great ty.

jit-altern

sorry for the bump i just need urgent help...is matrix positioning the right direction for this task??

yes you want to send only the submatrix to the effect, and then recombine with the original matrix using @dstdimstart/end