In MAME, by pressing the TAB key, you can move to the Slider Controls, and if everything worked out correctly, you find the changed default options of the shader in full detail: Gamma of output display: 2.0 (instead of 2.2)Īnd here is the result - my current default display shader:.Gamma of simulated CRT: 2.2 (instead of 2.4).Distance to screen: 3.0 (instead of 2.0).Radius of curvature: 2.0 (instead of 3.5).Halation amplitude: 0.05 (instead of 0.1).In order to get a nearly identical result to the OpenGL Shader, I changed these default settings: Your target in these sliders is the Default value, so forget about the Min and Max values. Here the options are called 'Sliders' because you can change these options via Sliders within Mame. Locate (Mame Directory)/bgfx/chains/crt-geom-deluxe.json and open this file in your editor. Modifying the preferences is as straight-forward as in the OpenGL Shader. You need a text editor such as Text Wrangler. ALTERNATIVE 3: If this does not work out, just add an Artwork Effect or - better - head for a new Mac.ALTERNATIVE 2: If this does not work out, go for GLSL with the CRT-GEOM Deluxe Backend instead (new instructions below).ALTERNATIVE 1: If your machine is powerful enough, go for BGFX with the CRT-GEOM Deluxe Backend (new instructions below).MAME STANDARD: bilinear filtering - just comes out of the box and gets rid of the worst pixel effects.HLSL Shader: the shader in the Windows environment - don't mix this up with HLSL Backends within GLSL or BGFX - which apparently try to emulate the HLSL Shader in Mac systems.BGFX Shader: the new kid on the block, designed for cross-platform experience, official part of MAME.OpenGL Shader - GLSL: for a long time the most important shader for Mac systems, still the performance king, but not part of the standard package.Backends: sub-sections of a shader that chosen once a shader is activated.Shader: program parts in MAME that can be activated for tweaking the Raw MAME output.Understand the meaning of these Buzz Words: This means that the tube screen feeling must be emulated on top. Since MAME focuses on exact emulation, the unmodified output is unsuitable for flatscreens.

Consider tweaking your screen output as soon as possible

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