#define help_r_backend \
"renderer back-end to use\n" \
S_COLOR_VAL "    GL2   " S_COLOR_HELP "= OpenGL 2.0\n" \
S_COLOR_VAL "    GL3   " S_COLOR_HELP "= OpenGL 3.2\n" \
S_COLOR_VAL "    D3D11 " S_COLOR_HELP "= Direct3D 11"

#define help_r_gl3_geoStream \
"geometry streaming strategy\n" \
"This only applies to the GL3 back-end. See " S_COLOR_CVAR "r_backend" S_COLOR_HELP " for details.\n" \
S_COLOR_VAL "    0 " S_COLOR_HELP "= Decide automatically\n" \
S_COLOR_VAL "    1 " S_COLOR_HELP "= BufferSubData\n" \
S_COLOR_VAL "    2 " S_COLOR_HELP "= Map Unsychronized\n" \
S_COLOR_VAL "    3 " S_COLOR_HELP "= Map Persistent when possible, else automatic\n" \
S_COLOR_VAL "    4 " S_COLOR_HELP "= AMD pinned memory when available, else automatic"

#define help_r_d3d11_syncOffsets \
"synchronizes vertex buffer offsets\n" \
"This only applies to the D3D11 back-end. See " S_COLOR_CVAR "r_backend" S_COLOR_HELP " for details.\n" \
S_COLOR_VAL "    0 " S_COLOR_HELP "= Split  buffer offsets (more API calls)\n" \
S_COLOR_VAL "    1 " S_COLOR_HELP "= Sync'd buffer offsets (more data transferred)\n" \
S_COLOR_VAL "    2 " S_COLOR_HELP "= Decide automatically"

#define help_r_d3d11_maxQueuedFrames \
"max. pre-rendered frames\n" \
"The number of frames that the system is allowed to queue for rendering."

#define help_r_ext_max_anisotropy \
"max. allowed anisotropy ratio\n" \
"For anisotropic filtering to be enabled, this needs to be 2 or higher.\n" \
S_COLOR_VAL "    2 " S_COLOR_HELP "=  8- 16 tap filtering\n" \
S_COLOR_VAL "    4 " S_COLOR_HELP "= 16- 32 tap filtering\n" \
S_COLOR_VAL "    8 " S_COLOR_HELP "= 32- 64 tap filtering\n" \
S_COLOR_VAL "   16 " S_COLOR_HELP "= 64-128 tap filtering"

#define help_r_picmip \
"lowest allowed mip level\n" \
"Lower number means sharper textures."

#define help_r_roundImagesDown \
"allows image downscaling before texture upload\n" \
"The maximum scale ratio is 2 on both the horizontal and vertical axis."

#define help_r_mode \
"video mode to use with " S_COLOR_CVAR "r_fullscreen " S_COLOR_VAL "1\n" \
S_COLOR_VAL "    0 " S_COLOR_HELP "= No video mode change, desktop resolution\n" \
S_COLOR_VAL "    1 " S_COLOR_HELP "= No video mode change, custom resolution, custom upscaling\n" \
S_COLOR_VAL "    2 " S_COLOR_HELP "= Video mode change, custom resolution\n" \
"Custom resolution uses " S_COLOR_CVAR "r_width " S_COLOR_HELP "and " S_COLOR_CVAR "r_height" S_COLOR_HELP ".\n" \
"Custom upscaling uses " S_COLOR_CVAR "r_blitMode" S_COLOR_HELP "."

#define help_r_blitMode \
"image upscaling mode for " S_COLOR_CVAR "r_mode " S_COLOR_VAL "1\n" \
"This will only be active with " S_COLOR_CVAR "r_fullscreen " S_COLOR_VAL "1 " S_COLOR_HELP "and " S_COLOR_CVAR "r_mode " S_COLOR_VAL "1" S_COLOR_HELP ".\n" \
S_COLOR_VAL "    0 " S_COLOR_HELP "= Aspect-ratio preserving upscale (black bars if necessary)\n" \
S_COLOR_VAL "    1 " S_COLOR_HELP "= No scaling, centered\n" \
S_COLOR_VAL "    2 " S_COLOR_HELP "= Full-screen stretching (no black bars)"

#define help_r_subdivisions \
"tessellation step size for patch surfaces\n" \
"This sets the step size of a subdivision, *not* the number of subdivisions.\n" \
"In other words, lower values produce smoother curves."

#define help_r_gamma \
"gamma correction factor\n" \
S_COLOR_HELP "   <" S_COLOR_VAL "1 " S_COLOR_HELP "= Darker\n" \
S_COLOR_VAL "    1 " S_COLOR_HELP "= No change\n" \
S_COLOR_HELP "   >" S_COLOR_VAL "1 " S_COLOR_HELP "= Brighter"

#define help_r_lodbias \
"MD3 models LOD bias\n" \
"For all MD3 models, including player characters.\n" \
"A higher number means a higher quality loss. " S_COLOR_VAL "0 " S_COLOR_HELP "means no loss."

#define help_r_fastsky \
"makes the sky and portals pure black\n" \
"Portal example: the bottom teleporter on q3dm7."

#define help_r_noportals \
"disables rendering of portals\n" \
"Portal example: the bottom teleporter on q3dm7."

#define help_r_swapInterval \
"Screen refresh periods to wait for before swapping buffers\n" \
S_COLOR_VAL "    N < 0 " S_COLOR_HELP "= Adaptive V-Sync: tears when too late\n" \
S_COLOR_VAL "    N = 0 " S_COLOR_HELP "= No V-Sync\n" \
S_COLOR_VAL "    N > 0 " S_COLOR_HELP "= Standard V-Sync: never tears\n" \
"Adaptive V-Sync is not available when " S_COLOR_CVAR "r_backend " S_COLOR_HELP "is " S_COLOR_VAL "D3D11" S_COLOR_HELP ".\n" \
"When adaptive V-Sync is not available, standard V-Sync is requested instead.\n" \
"Please note that with OpenGL, your driver settings can override any of this."

#define help_r_frameSleep \
"whether the client should sleep to maintain the FPS cap\n" \
S_COLOR_VAL "    0 " S_COLOR_HELP "= Forced OFF (when V-Sync is enabled)\n" \
S_COLOR_VAL "    1 " S_COLOR_HELP "= Forced ON  (when V-Sync is disabled)\n" \
S_COLOR_VAL "    2 " S_COLOR_HELP "= Automatic  (detects V-Sync status)\n" \
"This only applies to OpenGL rendering back-ends:\n" \
"For Direct3D 11, the mode is always 'automatic'."

#define help_r_lightmap \
"renders the lightmaps only\n" \
"Shaders with a lightmap stage will only draw the lightmap stage.\n" \
"This is mutually exclusive with " S_COLOR_CVAR "r_fullbright" S_COLOR_HELP "."

#define help_r_fullbright \
"renders the diffuse textures only\n" \
"Shaders with a lightmap stage will not draw the lightmap stage.\n" \
"This is mutually exclusive with " S_COLOR_CVAR "r_lightmap" S_COLOR_HELP "."

#define help_r_mipGenFilter \
"GPU mip-map filter\n" \
S_COLOR_VAL "    L4  " S_COLOR_HELP "= Lanczos 4\n" \
S_COLOR_VAL "    L3  " S_COLOR_HELP "= Lanczos 3\n" \
S_COLOR_VAL "    BL  " S_COLOR_HELP "= Bi-linear\n" \
S_COLOR_VAL "    MN2 " S_COLOR_HELP "= Mitchell-Netravali 2 (B = 1/3, C = 1/3)\n" \
S_COLOR_VAL "    BH4 " S_COLOR_HELP "= 3-term Blackman-Harris 4\n" \
S_COLOR_VAL "    BH3 " S_COLOR_HELP "= 3-term Blackman-Harris 3\n" \
S_COLOR_VAL "    BH2 " S_COLOR_HELP "= 3-term Blackman-Harris 2\n" \
S_COLOR_VAL "    T2  " S_COLOR_HELP "= Tent 2 (1/3 2/3, same as the CPU version)\n" \
"The numbers specify the 'radius' of the window filters."

#define help_r_mipGenGamma \
"GPU mip-map gamma\n" \
"Specifies the gamma space in which the textures are stored.\n" \
"This is only used by GPU-side mip-map generation (" S_COLOR_CVAR "r_gpuMipGen " S_COLOR_VAL "1" S_COLOR_HELP ").\n" \
"This should really be around " S_COLOR_VAL "2.4 " S_COLOR_HELP "(CRT screens),\n" \
"but defaults lower to not break the looks of some things\n" \
"(e.g. cpm3a's teleporter).\n" \
"While " S_COLOR_VAL "1.0 " S_COLOR_HELP "will match the game's original look,\n" \
"higher values will better preserve contrast."

#define help_r_softSprites \
"enables depth sprites\n" \
"With it, sprites like blood, smoke, etc don't 'cut' through geometry sharply."

#define help_r_gpuMipGen \
"enables GPU mip-map generation\n" \
"This will both improve map load times and image quality.\n" \
"Only disable if the feature isn't working for whatever reason."

#define help_r_alphaToCoverage \
"enables alpha to coverage\n" \
"This enables anti-aliasing of alpha-tested surfaces when MSAA is enabled.\n" \
"Therefore, this requires " S_COLOR_CVAR "r_msaa " S_COLOR_HELP "to be greater than 1."

#define help_r_dither \
"enables dithering\n" \
"Introduces noise to fight color banding artifacts.\n" \
"The strength of the noise is controlled by " S_COLOR_CVAR "r_noiseScale" S_COLOR_HELP "."

#define help_r_noiseScale \
"dithering noise strength\n" \
"The dithering on/off switch is " S_COLOR_CVAR "r_dither" S_COLOR_HELP "."