how do we combine 2 maps or 2 map blocks?

are there ways to multiply or do blends on two maps?
like this
6630016--755959--upload_2020-12-16_13-52-57.png
that’s because i need to set alive following this rule: positionmap.alpha=1 AND blissmap=0

Could you not sample the map yourself and do the logic based on the sampled value?

hello again
i have tried to sample by converting the index in uv (with those modulos and divs that I’m sure the gpu loves) but nothing i’ve tried works so that’s why i try to bypass all that sampling and let the block do its work

I think you’d be better off what’s going wrong doing it via sampling. Bear in mind there are two nodes for accessing a Texture2D - Sample Texture2D and Load Texture2D.

One uses UV 0-1 and the other integer pixel coordinates.