I bought a GT 1030 from Nvidia.
Now I wanted to play Minecraft with shaders but when I use the shader function from Optifine you can no longer see anything.
My question: Is it because of the GT card or is it because I modified the gamma myself.
What do you mean by nothing more? Can you post a screenshot?
If you mean that everything is black or blurry, it is probably more the shader but generally the 1030 is not a gaming card so it is difficult to get acceptable fps with shader try the link below that should actually work and also run well with the 1030
http://shadersmods.com/docteurdreads-shaders-mod/