- 【图像】 CGAxis - PBR Textures Volume 1 – Stones
- 收录时间:2020-11-13 文档个数:78 文档大小:1.0 GB 最近下载:2025-01-21 人气:4755 磁力链接
- beige_rough_stone_stone_86/beige_rough_stone_stone_86_diffuse.png 45.0 MB
- blue_granite_stone_57/blue_granite_stone_57_diffuse.png 42.5 MB
- blue_rough_stone_stone_18/blue_rough_stone_stone_18_diffuse.png 40.5 MB
- black_gravel_stone_21/black_gravel_stone_21_diffuse.png 39.3 MB
- beige_stone_stone_25/beige_stone_stone_25_diffuse.png 37.2 MB
- blue_shiny_rock_stone_82/blue_shiny_rock_stone_82_diffuse.png 36.1 MB
- black_gravel_stone_21/black_gravel_stone_21_normal.png 35.5 MB
- blue_rough_stone_stone_18/blue_rough_stone_stone_18_normal.png 33.9 MB
- black_marble_1_stone_12/black_marble_1_stone_12_normal.png 32.6 MB
- blue_marble_2_stone_100/blue_marble_2_stone_100_diffuse.png 32.5 MB
- beige_stone_stone_25/beige_stone_stone_25_normal.png 32.4 MB
- blue_granite_stone_57/blue_granite_stone_57_normal.png 29.3 MB
- blue_marble_1_stone_11/blue_marble_1_stone_11_normal.png 28.9 MB
- beige_rough_marble_stone_02/beige_rough_marble_stone_02_normal.png 28.2 MB
- blue_marble_1_stone_11/blue_marble_1_stone_11_diffuse.png 27.4 MB
- black_stone_stone_37/black_stone_stone_37_diffuse.png 26.2 MB
- black_stone_stone_37/black_stone_stone_37_normal.png 25.5 MB
- beige_rough_stone_stone_86/beige_rough_stone_stone_86_normal.png 25.4 MB
- black_marble_2_stone_99/black_marble_2_stone_99_diffuse.png 24.6 MB
- beige_rough_marble_stone_02/beige_rough_marble_stone_02_diffuse.png 21.1 MB
- 猜你喜欢: Textures Volume CGAxis Stones PBR
- 【影视】 26 Smart Materials and 4K PBR Textures + Video Tutorial
- 收录时间:2020-11-03 文档个数:504 文档大小:6.0 GB 最近下载:2024-11-17 人气:312 磁力链接
- Smart Materials-Tutorials-MK/Tutorials-MK/Lumion.mp4 63.5 MB
- PBR-Textures-Part 03-MK/21-Green-Plastic-Used/Vray/21-Green-Plastic-Used-VRay-Normal.png 35.4 MB
- PBR-Textures-Part 03-MK/21-Green-Plastic-Used/Unreal/21-Green-Plastic-Used-UE4-Normal.png 35.4 MB
- PBR-Textures-Part 03-MK/21-Green-Plastic-Used/Corona/21-Green-Plastic-Used-Corona-Normal.png 35.4 MB
- PBR-Textures-Part 02-MK/12-Old-Colored-Wood/Vray/12-Old-Colored-Wood-VRay-Normal.png 34.4 MB
- PBR-Textures-Part 02-MK/12-Old-Colored-Wood/Corona/12-Old-Colored-Wood-Corona-Normal.png 34.4 MB
- PBR-Textures-Part 02-MK/12-Old-Colored-Wood/Unreal/12-Old-Colored-Wood-UE4-Normal.png 34.4 MB
- Smart Materials-Tutorials-MK/Tutorials-MK/Vray-Corona-2.mp4 33.9 MB
- PBR-Textures-Part 02-MK/16-Rust/Corona/16-Rust-Corona-Diffuse.png 33.7 MB
- PBR-Textures-Part 02-MK/16-Rust/Vray/16-Rust-VRay-Diffuse.png 33.7 MB
- PBR-Textures-Part 01-MK/01-Wood/Vray/01-Wood-VRay-Normal.png 33.6 MB
- PBR-Textures-Part 01-MK/01-Wood/Corona/01-Wood-Corona-Normal.png 33.6 MB
- PBR-Textures-Part 01-MK/01-Wood/Unreal/01-Wood-UE4-Normal.png 33.6 MB
- PBR-Textures-Part 02-MK/11-Old-Wood-Burn/Vray/11-Old-Wood-Burn-VRay-Reflection.png 33.2 MB
- PBR-Textures-Part 02-MK/11-Old-Wood-Burn/Corona/11-Old-Wood-Burn-Corona-Reflection.png 33.2 MB
- PBR-Textures-Part 02-MK/16-Rust/Unreal/16-Rust-UE4-BaseColor.png 32.6 MB
- PBR-Textures-Part 01-MK/02-Rusty-Metal/Vray/02-Rusty-Metal-VRay-Normal.png 32.4 MB
- PBR-Textures-Part 01-MK/02-Rusty-Metal/Corona/02-Rusty-Metal-Corona-Normal.png 32.4 MB
- PBR-Textures-Part 01-MK/02-Rusty-Metal/Unreal/02-Rusty-Metal-UE4-Normal.png 32.4 MB
- PBR-Textures-Part 02-MK/11-Old-Wood-Burn/Vray/11-Old-Wood-Burn-VRay-Normal.png 32.3 MB
- 猜你喜欢: Textures 26 PBR Tutorial Materials Video 4K Smart
- 【其他】 Space Station Level Asset Pack - Zero Gravity PBR - Unity 5 v2.unitypackage
- 收录时间:2020-10-31 文档个数:1 文档大小:337.9 MB 最近下载:2020-10-31 人气:1 磁力链接
- Space Station Level Asset Pack - Zero Gravity PBR - Unity 5 v2.unitypackage 337.9 MB
- 猜你喜欢: unitypackage Unity Level Space Gravity PBR v2 Zero Station Asset
- 【压缩文件】 Gumroad - Crimson Ronin - 3D PBR Character Creation for Games (2019) [RUS, ENG]
- 收录时间:2020-10-02 文档个数:52 文档大小:6.9 GB 最近下载:2025-01-23 人气:29238 磁力链接
- Course-files.zip 1.9 GB
- Chapter 5 - Retopology/05-04. Torso-27.mp4 393.8 MB
- Chapter 6 - UV/06-04. UV-map-full-timelapse-33.mp4 325.5 MB
- Chapter 5 - Retopology/05-05. lower-body-retopology-28.mp4 318.1 MB
- Chapter 6 - UV/06-01. UVs-30.mp4 198.9 MB
- Chapter 6 - UV/06-03. UV-map-optimisation-part2-32.mp4 192.1 MB
- Chapter 7 - Basic Textures/07-02. Textures-baking-(TL)-35.mp4 157.9 MB
- Chapter 3 - Armour/03-07. Detailing-thigh-plates-15.mp4 142.0 MB
- Chapter 3 - Armour/03-06. Detailing-cloth-shinguards-(TL)-14.mp4 136.1 MB
- Chapter 9 - Presentation/09-01. Final-POSE-45.mp4 130.2 MB
- Chapter 8 - Materials/08-04. Base-colour-(TL)-39.mp4 128.2 MB
- Chapter 5 - Retopology/05-06. Accessories-and-polishing-retopology-29.mp4 122.0 MB
- Chapter 0 - Introduction/Presentation video.mp4 121.2 MB
- Chapter 6 - UV/06-02. UV-map-optimisation-31.mp4 117.0 MB
- Chapter 2 - Body/02-02. Body-sculpting-part1-4.mp4 112.2 MB
- Chapter 8 - Materials/08-05. Basic-materials-40.mp4 109.6 MB
- Chapter 5 - Retopology/05-03. Hands-retopology-26.mp4 106.5 MB
- Chapter 3 - Armour/03-04. Detailing-the-belt-12.mp4 104.6 MB
- Chapter 2 - Body/02-04. Head-sculpting-6.mp4 102.7 MB
- Chapter 7 - Basic Textures/07-03. Textures-correction-1.mp4 102.2 MB
- 猜你喜欢: PBR Creation Character ENG 2019 Gumroad Games RUS Crimson Ronin
- 【压缩文件】 Collection old tools PBR-Scans
- 收录时间:2020-07-15 文档个数:52 文档大小:3.9 GB 最近下载:2024-02-01 人气:117 磁力链接
- 38_Drill.rar 151.4 MB
- 162_jerrycan.rar 149.9 MB
- 81_chisels.rar 148.0 MB
- 34_satchel.rar 136.5 MB
- 166_jig_saw.rar 127.4 MB
- 108_JerryCan.rar 126.4 MB
- 02_vognegasnyk.rar 122.7 MB
- 40_JackPlane.rar 121.3 MB
- 35_SatchelOpen.rar 113.1 MB
- 163_drill.rar 110.3 MB
- 32_Welding.rar 101.2 MB
- 88_chisels.rar 98.7 MB
- 63_hatchet.rar 95.2 MB
- 60_cleaver.rar 94.6 MB
- 82_dril.rar 94.4 MB
- 117_wrenchs.rar 87.3 MB
- 120_wrenchs.rar 86.9 MB
- 118_wrenchs.rar 86.6 MB
- 107_brush.rar 86.0 MB
- 119_wrenchs.rar 84.7 MB
- 猜你喜欢: tools Scans old Collection PBR
- 【压缩文件】 Gumroad - Crimson Ronin - 3D PBR Character Creation for Games (2019)
- 收录时间:2020-07-04 文档个数:51 文档大小:6.5 GB 最近下载:2025-01-05 人气:3601 磁力链接
- Course-files.zip 1.9 GB
- Chapter 5 - Retopology/05-04-Torso-27.mp4 369.4 MB
- Chapter 6 - UV/06-04-UV-map-full-timelapse-33.mp4 325.5 MB
- Chapter 5 - Retopology/05-05-lower-body-retopology-28.mp4 318.1 MB
- Chapter 6 - UV/06-01-UVs-30.mp4 185.7 MB
- Chapter 6 - UV/06-03-UV-map-optimisation-part2-32.mp4 175.7 MB
- Chapter 7 - Basic Textures/07-02-textures-baking(TL)-35.mp4 157.9 MB
- Chapter 3 - Armour/03-06-Detailing-cloth-shinguards(TL)-14.mp4 136.1 MB
- Chapter 8 - Materials/08-04-Base-colour-(TL)-39.mp4 128.2 MB
- Chapter 3 - Armour/03-07-Detailing-thigh-plates-15.mp4 128.0 MB
- Chapter 9 - Presentation/09-01-Final-POSE-45.mp4 118.1 MB
- Chapter 5 - Retopology/05-06-Accessories-and-polishing-retopology-29.mp4 110.7 MB
- Chapter 6 - UV/06-02-UV-map-optimisation-31.mp4 107.6 MB
- Chapter 7 - Basic Textures/07-03-textures-correction-1.mp4 96.9 MB
- Chapter 5 - Retopology/05-03-Hands-retopology-26.mp4 96.0 MB
- Chapter 2 - Body/02-02-Body-sculpting-part1-4.mp4 95.9 MB
- Chapter 8 - Materials/08-05-Basic-materials-40.mp4 95.6 MB
- Chapter 3 - Armour/03-04-Detailing-the-belt-12.mp4 95.1 MB
- Chapter 3 - Armour/03-02-Building-the-armour-part2-10.mp4 91.4 MB
- Chapter 3 - Armour/03-08-Belt-shinguard-pant(TL)-16.mp4 91.0 MB
- 猜你喜欢: PBR Creation Character 2019 Gumroad Games Crimson Ronin 3D
- 【压缩文件】 CGAxis PBR Textures Volume 14 -FABRIC.rar
- 收录时间:2020-06-12 文档个数:1 文档大小:24.1 GB 最近下载:2025-01-14 人气:1373 磁力链接
- CGAxis PBR Textures Volume 14 -FABRIC.rar 24.1 GB
- 猜你喜欢: Textures 14 PBR Volume CGAxis rar FABRIC
- 【其他】 Unity Asset - PBR Urban Interior Props Pack v1.1(Exported)[AKD][CTRC]
- 收录时间:2020-06-06 文档个数:2 文档大小:201.6 MB 最近下载:2024-12-24 人气:936 磁力链接
- [PBR] Urban Interior Props Pack v1.1.unitypackage 201.4 MB
- z_001_11032016_582.jpg 171.3 kB
- 猜你喜欢: Urban Exported PBR CTRC v1 Unity Asset Props Interior AKD
- 【压缩文件】 PBR Game 3D Models Bundle 2 Jan 2020
- 收录时间:2020-05-25 文档个数:55 文档大小:3.1 GB 最近下载:2025-01-21 人气:6214 磁力链接
- Private Villa Exterior Scene 06.rar 273.6 MB
- Cgtrader - Alita Battle Angel 3D Model.7z 246.9 MB
- Fantasy Weapon Set.rar 228.5 MB
- T-90 Tank.zip 166.7 MB
- Turbosquid - Inflatable boat Zodiac Mark-2 and Yamaha F15 portable outboard 3D model.rar 145.4 MB
- Sci-Fi girl 3d model.zip 138.8 MB
- Old Rowing Boat 3D Model.zip 130.4 MB
- Abandoned Warehouse.zip 113.2 MB
- Sci-Fi Interior 3d model.rar 105.0 MB
- Exterior building 3d model.zip 98.4 MB
- Musclehead 3D model.rar 96.5 MB
- Sexy Girl in blue Lingerie 3D Model.zip 87.1 MB
- Rainer AK 3D model.rar 80.0 MB
- Big rock 3d model.zip 76.3 MB
- Animated Shelter 3D model.zip 71.6 MB
- Old Man Marble Bust.zip 67.7 MB
- Shadow Yamato 3d model.zip 58.5 MB
- WW2 Tank PzKpfw 2 Ausf L.zip 54.4 MB
- Fortress in iceland 3d model.rar 51.7 MB
- Power armor girl.zip 51.5 MB
- 猜你喜欢: PBR Models Bundle Jan Game 2020 3D
- 【其他】 Unity Asset - PBR Woman Soldier v1.0
- 收录时间:2020-05-19 文档个数:1 文档大小:279.2 MB 最近下载:2023-08-15 人气:370 磁力链接
- PBR Woman Soldier v1.0.unitypackage 279.2 MB
- 猜你喜欢: Woman v1 PBR Soldier Unity Asset
- 【其他】 Unity Asset Store - PBR Monster Pack #1 (Mushroom Monster, Giant Worm, Rock Monster, Plant Monster) - 42321.unitypackage
- 收录时间:2020-05-10 文档个数:1 文档大小:1.6 GB 最近下载:2025-01-04 人气:1096 磁力链接
- Unity Asset Store - PBR Monster Pack #1 (Mushroom Monster, Giant Worm, Rock Monster, Plant Monster) - 42321.unitypackage 1.6 GB
- 猜你喜欢: Monster Giant unitypackage Mushroom PBR Worm Plant Unity Asset Rock
- 【音乐】 The Weeknd - After Hours, 2020 PBR&B DTS
- 收录时间:2020-05-05 文档个数:5 文档大小:600.8 MB 最近下载:2024-09-14 人气:1058 磁力链接
- The Weeknd - After Hours, 2020 PBR&B DTS.wav 595.8 MB
- Cover.jpg 4.7 MB
- Sticker.jpg 318.5 kB
- foo_dr.txt 1.7 kB
- The Weeknd - After Hours, 2020 PBR&B DTS.cue 1.2 kB
- 猜你喜欢: Weeknd PBR After Hours 2020 DTS
- 【压缩文件】 Crimson Ronin – PBR Character Creation for Games
- 收录时间:2020-05-03 文档个数:50 文档大小:6.4 GB 最近下载:2023-07-20 人气:25 磁力链接
- Course-files.zip 1.9 GB
- Chapter 5 - Retopology/05-04-Torso-27.mp4 369.4 MB
- Chapter 6 - UV/06-04-UV-map-full-timelapse-33.mp4 325.5 MB
- Chapter 5 - Retopology/05-05-lower-body-retopology-28.mp4 318.1 MB
- Chapter 6 - UV/06-01-UVs-30.mp4 185.7 MB
- Chapter 6 - UV/06-03-UV-map-optimisation-part2-32.mp4 175.7 MB
- Chapter 7 - Basic Textures/07-02-textures-baking(TL)-35.mp4 157.9 MB
- Chapter 3 - Armour/03-06-Detailing-cloth-shinguards(TL)-14.mp4 136.1 MB
- Chapter 8 - Materials/08-04-Base-colour-(TL)-39.mp4 128.2 MB
- Chapter 3 - Armour/03-07-Detailing-thigh-plates-15.mp4 128.0 MB
- Chapter 9 - Presentation/09-01-Final-POSE-45.mp4 118.1 MB
- Chapter 5 - Retopology/05-06-Accessories-and-polishing-retopology-29.mp4 110.7 MB
- Chapter 6 - UV/06-02-UV-map-optimisation-31.mp4 107.6 MB
- Chapter 7 - Basic Textures/07-03-textures-correction-1.mp4 96.9 MB
- Chapter 5 - Retopology/05-03-Hands-retopology-26.mp4 96.0 MB
- Chapter 2 - Body/02-02-Body-sculpting-part1-4.mp4 95.9 MB
- Chapter 8 - Materials/08-05-Basic-materials-40.mp4 95.6 MB
- Chapter 3 - Armour/03-04-Detailing-the-belt-12.mp4 95.1 MB
- Chapter 3 - Armour/03-02-Building-the-armour-part2-10.mp4 91.4 MB
- Chapter 3 - Armour/03-08-Belt-shinguard-pant(TL)-16.mp4 91.0 MB
- 猜你喜欢: PBR Creation Character Games Crimson Ronin
- 【影视】 Udemy - The Secrets to Photorealism - The PBR Blender 2.8 Workflow by Daniel Krafft (2019)
- 收录时间:2020-04-26 文档个数:52 文档大小:2.6 GB 最近下载:2025-01-13 人气:5944 磁力链接
- 02. Let's Create a Material/01. Texture Resources.mp4 405.7 MB
- 01. Introduction/04. PBR Explained.mp4 335.0 MB
- 02. Let's Create a Material/02. Scene Setup.mp4 190.2 MB
- 02. Let's Create a Material/04. Cycles In-Depth.mp4 177.5 MB
- 02. Let's Create a Material/05. EEVEE In-Depth.mp4 165.4 MB
- 02. Let's Create a Material/03. Choosing between Cycles and EEVEE.mp4 137.6 MB
- 05. Conclusion/01. Presenting Your Material.mp4 124.6 MB
- 05. Conclusion/02. What's Next.mp4 111.3 MB
- 04. Rendering/04. Color Management.mp4 106.9 MB
- 03. PBR Maps/01. DiffuseBase ColorAlbedo.mp4 100.8 MB
- 04. Rendering/02. Lighting your Scene.mp4 87.2 MB
- 04. Rendering/03. HDRIs.mp4 86.3 MB
- 03. PBR Maps/09. Surface Imperfection.mp4 83.7 MB
- 03. PBR Maps/10. Subsurface Scattering.mp4 75.0 MB
- 03. PBR Maps/05. HeightDisplacement.mp4 74.1 MB
- 04. Rendering/01. Render Settings Do yours make sense.mp4 72.8 MB
- 01. Introduction/02. Intro.mp4 53.0 MB
- 02. Let's Create a Material/06. What the Principled BSDF Actually Does.mp4 42.6 MB
- 03. PBR Maps/07. Opacity.mp4 42.1 MB
- 03. PBR Maps/02. RoughnessGlossiness.mp4 36.3 MB
- 猜你喜欢: PBR Secrets Photorealism Workflow Udemy Daniel 2.8 2019 Krafft Blender
- 【压缩文件】 Blender PBR materials.rar
- 收录时间:2020-04-23 文档个数:1 文档大小:2.5 GB 最近下载:2024-09-29 人气:652 磁力链接
- Blender PBR materials.rar 2.5 GB
- 猜你喜欢: PBR rar materials Blender
- 【压缩文件】 [ FreeCourseWeb.com ] Udemy - The Secrets to Photorealism- The PBR-Blender 2.8 Workflow.zip
- 收录时间:2020-04-15 文档个数:1 文档大小:2.6 GB 最近下载:2024-12-06 人气:1639 磁力链接
- [ FreeCourseWeb.com ] Udemy - The Secrets to Photorealism- The PBR-Blender 2.8 Workflow.zip 2.6 GB
- 猜你喜欢: zip PBR Secrets Photorealism Workflow Udemy 2.8 FreeCourseWeb com Blender
- 【影视】 Blade Tutorial - Extended Edition - Substance Painter 2 - PBR Texturing
- 收录时间:2020-04-15 文档个数:13 文档大小:6.3 GB 最近下载:2024-09-13 人气:364 磁力链接
- Free/Blade_3DSMAX_2017_Modeling.mp4 2.3 GB
- Extended/Blade_Substance_Painter_2_Texturing_Extended.mp4 2.2 GB
- Free/Blade_Substance_Painter_2_Texturing.mp4 982.6 MB
- Extended/Essentials_extended/Kukri.spp 545.1 MB
- Extended/Essentials_extended/kukri_high.obj 148.6 MB
- Free/Essentials/kukri_high.obj 148.6 MB
- Extended/Essentials_extended/_images/hello_bear_4096.jpg 4.2 MB
- Extended/Essentials_extended/_images/floral-pattern.jpg 1.4 MB
- Extended/Essentials_extended/_images/skulls.jpg 795.2 kB
- Free/Essentials/_references/side.jpg 439.5 kB
- Free/Essentials/_references/side_straight_grip.jpg 431.3 kB
- Extended/Essentials_extended/kukri_low.FBX 141.9 kB
- Free/Essentials/kukri_low.FBX 141.9 kB
- 猜你喜欢: Extended PBR Blade Texturing Edition Substance Tutorial Painter
- 【图像】 1500 PBR Textures
- 收录时间:2020-04-15 文档个数:1 文档大小:9.4 GB 最近下载:2020-04-15 人气:1 磁力链接
- 1500 PBR Textures 9.4 GB
- 猜你喜欢: Textures 1500 PBR
- 【压缩文件】 CGAXIS FULL PBR TEXTURES 2020.rar
- 收录时间:2020-04-07 文档个数:1 文档大小:241.6 GB 最近下载:2024-08-17 人气:866 磁力链接
- CGAXIS FULL PBR TEXTURES 2020.rar 241.6 GB
- 猜你喜欢: TEXTURES FULL PBR CGAXIS rar 2020
- 【音乐】 PBR&B DrumKit
- 收录时间:2020-04-06 文档个数:91 文档大小:244.9 MB 最近下载:2025-01-20 人气:1490 磁力链接
- PBR&B DrumKit/PBR&B Sample Pack/Needs To Be Chopped/FANTASY.mp3 7.1 MB
- PBR&B DrumKit/PBR&B Sample Pack/Needs To Be Chopped/KXLD - Evasion.mp3 6.3 MB
- PBR&B DrumKit/PBR&B Sample Pack/Needs To Be Chopped/Exempt - Promised You.mp3 6.2 MB
- PBR&B DrumKit/PBR&B Sample Pack/Hollow(Hook).wav 6.2 MB
- PBR&B DrumKit/PBR&B Sample Pack/They Will Grow(Beat).wav 6.0 MB
- PBR&B DrumKit/PBR&B Sample Pack/WoWo(Intro).wav 6.0 MB
- PBR&B DrumKit/PBR&B Sample Pack/EarlyHour(Hook).wav 5.9 MB
- PBR&B DrumKit/PBR&B Sample Pack/They Will Grow(Hook).wav 5.8 MB
- PBR&B DrumKit/PBR&B Sample Pack/Echoes Of Silence(Hook).wav 5.6 MB
- PBR&B DrumKit/PBR&B Sample Pack/They Will Grow(Intro).wav 5.3 MB
- PBR&B DrumKit/PBR&B Sample Pack/SummerFling(Hook).wav 5.3 MB
- PBR&B DrumKit/PBR&B Sample Pack/Needs To Be Chopped/Howlings - Don't Leave Me.mp3 5.2 MB
- PBR&B DrumKit/PBR&B Sample Pack/Attraction(Beat2).wav 5.2 MB
- PBR&B DrumKit/PBR&B Sample Pack/Attraction(Beat).wav 5.2 MB
- PBR&B DrumKit/PBR&B Sample Pack/Missing You(Intro).wav 5.2 MB
- PBR&B DrumKit/PBR&B Sample Pack/Missing You(Hook).wav 5.2 MB
- PBR&B DrumKit/PBR&B Sample Pack/Dusk(Intro).wav 5.1 MB
- PBR&B DrumKit/PBR&B Sample Pack/Imber(Beat2).wav 4.9 MB
- PBR&B DrumKit/PBR&B Sample Pack/Imber(Hook).wav 4.9 MB
- PBR&B DrumKit/PBR&B Sample Pack/Imber(Intro).wav 4.8 MB
- 猜你喜欢: DrumKit PBR