Monday, December 27, 2010

SSS test

 
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http://blog.naver.com/billywagner/150099647963
2010-12-27 17:05:11
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1. 기본 재질인 유리재질
Reflection 0 - 35,35,35 / Reflection 90 - 255,255,255 / Transmittance - 255,255,255 / Attenuation 30cm  Nd 1.51
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2. 1번에서 Nd의 Force Fresnel 을 체크한 경우 - 이 경우는 차이가 없음.
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3 -1 . 1번의 유리재질에서 Scatter Coeff 를 1.0 으로, Scatter Color 는 200,200,200의 회색으로 하였음.
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3-2. Scatter Coeff 를 10으로 높였음. 좀 더 플라스틱 Cd쥬얼케이스 같은 느낌으로 됨.
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3-3. Scatter Coeff 를 30으로 더 높였음. 좀 더 부드러운 재질의 투명플라스틱으로 됨.
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3-4. Scatter Coeff 를 100으로 높였음. 내부의 빛 산란이 너무 커져서 투명하게 보이지 않음.
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3-5. Scatter Coeff 를 300으로 높임. 오래 랜더링 하면 반투명 플라스틱 혹은 실리콘 느낌이 날 듯
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3-2-1 . 3-2 에서와 동일하지만 Force Fresnel을 켠 경우. 차이 없음.
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4-1. 3-2 와 동일한 플라스틱 재질 설정이지만 Scatter Color 를 하늘색(80,200,200)으로 변경했음.
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4-2. 4-1과 동일하지만 Scatter Coeff를 30으로 높였음.
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5. 4-2와 동일하지만 Roughness 값을 20으로 하였음.
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6. Reflection 색상은 Black & White 로 그대로이지만 Transmittance 색상을 하늘색(80,200,200)으로 하고
Scatter Color는 기존과 같이 200,200,200으로 함
즉 4번과 색상은 동일하지만 4번은 Scatter Color를 하늘색으로 하였고, 6번은 Transmittance Color를 하늘색으로 하였음.
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7. 3-3과 동일하게 Reflection색상은 흑/백 이고 Transmittance 색상도 흰색이며 Scatter Color도 회색(200)이며, Scatter Coeff 는 30이지만 Asymmetry 가 0이 아니라 1.0임(최대값)
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8. 7과 같지만 Asymmetry 가 이번에는 -1.0임(최소값)
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9-1. 3-3과 마찬가지로 Transmittance white 에 Scatter Coeff 30, Scatter Color grey 이지만 Reflectance 색을 모두 skyblue(80,200,200)로 설정함.
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9-2. 9-1에서 Asymmetry 를 1.0으로 하였음.
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9-3. 9-1에서 Asymmetry를 -1.0 으로 바꾸었음.
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10-1. 3-3과 동일하지만 Attenuation 을 1cm로 낮춤. 플라스틱 덮개의 크기는 35cmx35cmx6cm 이며 두께는 1cm.
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10-2. Attenuation 1mm
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11-1. 3-3과 동일하지만 Transmittance color 는 보라색(255,100,255), Scatter color는 하늘색(80,200,200) 
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11-2. 11-1과 조건은 동일하지만 Attenuation 이 1cm 로 낮춰지면서 Transmittance 색상이 더 묻어 나왔음.
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11-3. 11-1과 동일하지만 Scatter Coeff 를 30에서 100으로 높였음.
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11-4 11-3과 동일하지만 Attenuation 값을 30cm에서 5cm로 낮췄음.
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11-5. 11-4에서 Roughness 를 40으로 높였음.
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11-6. 11-5 에서 Asymmetry 를 -0.9 로 함.
Reflection : black/white / Transmittance : Purple     / Attenuation : 5cm    / Nd :1.51
Scatter Coeff :100       / Scatter color : skyblue
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11-7. 11-5에서 Asymmetry를 0.9로 함.
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sample 1.
reflectance 35 / 255            transmittance 255
attenuation 5mm                  nd 1.45                  scatter coeff 300           scatter color 135       asymmetry -0.8
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sample2. sample1에서 Roughness 를 10으로 설정함.
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sample3. scatter coeff 30. roughness 20
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sample4. sample3에서 scatter color를 135->242로 높였음.
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sample 5. silicon preset
reflectance : 71 / 94 grey           transmittance : ivory 228 223 207 
attenuation : 20cm                    nd : 1.3 force fresnel                         roughness : 10
scatter coeff : 150                    scatter color : pastel blue 144 157 202  전체 색상을 푸르스름하게 만들어 줌
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sample6 . polyurethane preset
reflectance : 54 53 51 / 84 81 77           transmittance : yellow 232 223 154 
attenuation : 1cm                                  nd : 1.3 force fresnel                         roughness : 35
scatter coeff : 30                                  scatter color : pastel green 201 214 149
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sample 6-1. modified polyurethane
reflectance : 54 53 51 / 206           transmittance : 207 205 207 
attenuation : 1cm                    nd : 1.3 force fresnel                         roughness : 7
scatter coeff : 30                    scatter color : pastel green 180 180 182
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sample 6-2. 6-1+coating
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sample 7. rubber blue
reflectance : 진청 44 48 66 / 52 58 80           transmittance : 블루 21 62 228
attenuation : 2cm                                         nd : 1.3 force fresnel                         roughness : 75
scatter coeff : 100                                       scatter color : 스카이블루 57 206 223
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sample 7-1.
reflectance : 진청 44 48 66 / 52 58 80           transmittance : 블루 21 62 228
attenuation : 20cm                                       nd : 1.3 force fresnel                         roughness : 25
scatter coeff : 100                                       scatter color : 스카이블루 57 206 223
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sample 8 cheese
reflectance : brown 97 81 47 / beige 175 164 109    transmittance : orange 191 122 3
attenuation : 1cm                                                 nd : 1.4 force fresnel                         roughness : 30
scatter coeff : 4000                                             scatter color : bluish grey 108 117 130
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sample 9 orange juice
reflectance : pure black 0 / 0           transmittance : orange 199 138 8
attenuation : 4cm                          nd : 1.3 force fresnel                         roughness : 0
scatter coeff : 250                        scatter color : yellow green 141 177 25
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sample 10. acrylic signal
reflectance : pure black 0 / 0     transmittance : yellow 254 209 17
attenuation : 1mm                    nd : 1.51 force fresnel                         roughness : 3
scatter coeff : 40                     scatter color : pastel green 213 241 0
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sample 11 chocolate hot
70 weight reflectance : soft brown 41 31 30 / 41 33 30                      transmittance : choco 27 11 7
              attenuation : 4mm                    nd : 1.3                            roughness : 80
              scatter coeff : 1000                 scatter color : light brown 123 79 65
30 weight reflectance : dark grey 31 / 33                                          transmittance : choco 27 11 7
              attenuation : 4mm                    nd : 1.3 force fresnel           roughness : 20
              scatter coeff : 1000                 scatter color : light brown 123 79 65
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sample 12 chocolate cold
reflectance : dark brown 41 33 32 / brown 53 35 33           transmittance : choco 27 11 7
attenuation : 4mm                    nd : 1.3                           roughness : 80
scatter coeff : 1000                 scatter color : light brown 123 83 71
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sample 13 milk delute
reflectance : pure black 0 / 0        transmittance : milk 226 219 197 
attenuation : 1cm                       nd : 1.3 force fresnel                         roughness : 0
scatter coeff : 1820                    scatter color : pastel blue 166 188 218
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sample 13-1 milk 1
reflectance : pure black 0 / 0        transmittance : milk 216 210 194 
attenuation : 1cm                       nd : 1.3 force fresnel                         roughness : 0
scatter coeff : 3000                    scatter color : pastel blue 188 201 218
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sample13-2 milk 2
reflectance : pure black 0 / 0        transmittance : beige 199 166 129 
attenuation : 4cm                       nd : 1.34 force fresnel                         roughness : 0
scatter coeff : 3000                   scatter color : pastel blue 197 206 218   Asymmetry : -0.3
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Sample 14
SSS wizard - color : green 32 133 32   object tickness : 10cm   Roghness : 5    Density : 50
=> 다음과 같이 변환됨
reflectance : pure black 0 / 0        transmittance : 32 133 32
attenuation : 4.79cm                       nd : 1.25 force fresnel                         roughness : 5
scatter coeff : 50                    scatter color : pastel blue 32 133 32
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sample 15
reflectance : pure black 0 / 0   transmittance : orange 229 131 92
attenuation : 10cm                 nd : 1.25 force fresnel                             Roughness : 3
scatter coeff : 100                 scatter color : light orange 200 150 75       Asymmetry : -0.78

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