Shader to avoid flickering

Some old games have a strong flickering effect, which however are annoying and sometimes hurting eyes. Gunstar heroes for example starts to flicker if the health is low. For some persons the flickering makes the game not playable.

This is the reason why I ask about a possible shader to eliminate the flicker. For gunstar heroes it would be fully efficient, to only have a red bar instead of a red/blue flickering bar.

I’m not sure but I’d guess the only way to fix the low health bar flickering is with a romhack. Correct me if i’m wrong.

I guess that as well. But i am not sure. That‘s why i am asking if it possible via a shader

You could try running motionblur/response-time with a low response time value so it just mixes the current frame with one or two previous frames.

Thanks a lot. I will try that =)