Sure you got it here: https://www.shadermod.mm2br.com/.But I remember that I got it somewhere two weeks ago...
That site gives information about the Shader Mod 2, is possible to download it (also the Gold final version without password, that now is called Full version) and gives also information about the Shader Mod 3. This last will have a new arrow in races (like the one of the MM2 Checkpoint mod by Niggie), a new HUD, new menu's textures and even the sun and the moon! Add a sun and a moon for the MM2BR team will be a challenge for the project to give a more realism to the game.