В интернете нашёл только на HLSL, и переписал на CG. Модельки из HL2 и Metro 2033. 
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(на скринах есть ещё ссао и блум) Для Ogre3d vignetting.cg: sampler RT : register(s0);
float4 main_ps(float2 iTexCoord : TEXCOORD0,
uniform float radius,
uniform float darkness) : COLOR
{
float4 color=tex2D(RT,iTexCoord);
float2 inTex = iTexCoord - 0.5;
float vignette = 1 - dot(inTex, inTex);
color.rgb *= saturate(pow(vignette, radius) + darkness);
return color;
} fragment_program Vignetting cg
{
source vignetting.cg
entry_point main_ps
default_params
{
param_named radius float 4
param_named darkness float 0.7
}
profiles ps_2_x arbfp1
}
material Ogre/Compositor/Vignetting
{
technique
{
pass
{
depth_check off
vertex_program_ref Ogre/Compositor/StdQuad_Cg_vp
{
}
fragment_program_ref Vignetting
{
}
texture_unit RT
{
tex_coord_set 0
tex_address_mode clamp
filtering linear linear linear
}
}
}
}
compositor vignetting
{
technique
{
texture rt0 target_width target_height PF_R8G8B8
target rt0 { input previous }
target_output
{
// Start with clear output
input none
pass render_quad
{
material Ogre/Compositor/Vignetting
input 0 rt0
}
}
}
}
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