S4real
Quote: "the shader does need to have correct textures for the shader to work "
Yes correct. The "multi_1 & multi_2.dds"
texture files. Been double checking everything.
Thank you for the update. Downloaded v1.20.19_beta_v1.12.
Tested one more time using beta19j and "multi.fx" did not work.
Dropped in beta v1.12 and all works fine

Ran a test map with postprocess=1, dropped in the "multi.fx" the "camshake" and several other full-screen shaders across the map
and all tested fine. The build was even lower and had a solid
47-55fps.
Thank so much s4real
You know you're a bad gamer when you're able to run out of infinite lives.