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| {{DISPLAYTITLE:Parameter Maps}} | | {{DISPLAYTITLE:Parameter Maps}} |
| Parameter Maps (PRM) is Sonic Team's designation of choice for the texture maps used to represent different PBR material attributes in Hedgehog Engine 2 games.
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| How the PRM is laid out depends on the game and the shader used by any given material.
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| == '''''Mario & Sonic at the Rio 2016 Olympic Games''''' ==
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| [[File:2016PRM example.webp|alt=|center|thumb|256x256px|son_body_prm]]
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| [[File:2016PRM decomp.webp|center|thumb|512x512px|Red Channel, Green Channel, Blue Channel and Alpha Channel (son_body_prm)]]
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| In this PRM layout, the red channel of the PRM is the '''Specular Map''', the green channel is the '''Smoothness Map''' (opposite of roughness), the blue channel is the '''Ambient Occlusion Map''' and the alpha channel is the '''Cavity Map'''*.
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| Areas with a '''value of or above 90''' (out of 100) in the '''red channel''' of the PRM are considered '''completely metallic''' by most shaders.
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| <nowiki>*</nowiki>just a guess at the moment, hasn't been confirmed
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| == '''''Sonic Forces''''' ==
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| [[File:FoPRM example.webp|center|thumb|256x256px|chr_sonic_body_prm]]
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| [[File:FoPRM decomp.webp|center|thumb|512x512px|Red Channel, Green Channel and Blue Channel (chr_sonic_body_prm)]]
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| In this PRM layout, the red channel of the PRM is the '''Specular Map''', the green channel is the '''Smoothness Map''' (opposite of roughness) and the blue channel is the '''Ambient Occlusion Map'''.
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| '''Areas with a value of or above 90 (out of 100) in the red channel of the PRM are considered completely metallic by most shaders.'''
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| === '''MCommon Shaders''' ===
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| [[File:FoMCPRM example.webp|center|thumb|256x256px|chr_silver_cloth_prm]]
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| [[File:FoMCPRM decomp.webp|center|thumb|512x512px|Red Channel, Green Channel, Blue Channel and Alpha Channel (chr_silver_cloth_prm)]]
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| This PRM layout is the same as previously mentioned, just with an added '''Metallic Map''' in the alpha channel.
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| == '''''Sonic Frontiers'' and ''Shadow Generations''''' ==
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| [[File:FrShPRM example.webp|center|thumb|256x256px|chr_sonic_cloth_prm]]
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| [[File:FrShPRM-decomp.webp|center|thumb|512x512px|Red Channel, Green Channel, Blue Channel and Alpha Channel (chr_sonic_cloth_prm)]]
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| In this PRM layout, the red channel of the PRM is the '''Specular Map''', the green channel is the '''Smoothness Map''' (opposite of roughness), the blue channel is the '''Metallic Map''' and the alpha channel is the '''Ambient Occlusion Map'''.
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