Water Flow in Portal 2

A 3D rendered scene of a forest. The ground is covered in a blue and purple wavy normal map texture, which is tiled across the surface. Red lines are overlaid on the texture, forming a grid pattern. In the background, there are dark, silhouetted trees and a small wooden structure.

A close-up view of the normal map texture, showing a dense, wavy pattern of blue and purple colors.

The Houdini logo, featuring a stylized red and blue 'G' shape with a glowing effect.

The image shows the Houdini software interface. On the left is a 3D viewport displaying a complex level geometry with a large, flat, light-colored surface and a raised platform. The surface is covered with numerous small, dark, textured objects, possibly representing grass or debris. The platform has a similar texture. On the right is the Houdini node editor. The 'Tree View' tab is active, showing a hierarchy of nodes. The 'Obstacles' node is selected. Below it, the 'merge2' node is visible, followed by the 'acet1' node. The 'redirect' node is also present. The 'merge4' node is highlighted, and the 'Write_Read_BGEO' node is visible below it. The 'Stamp Name' field is set to 'FORVALUE', the 'Group Mask' is 'swamp_grass*', and the 'Attribute' is 'class'. The 'Tolerance' is set to '0.001'.

The SIGGRAPH 2010 logo, featuring a stylized red and blue sphere with a white ring, set against a white background.

A screenshot of the Houdini software interface showing a procedural mask workflow. The left pane displays a 3D view of a dark scene with red, glowing, circular patterns and a white wireframe grid. The right pane shows the Houdini node editor with a network of nodes including 'attribcreate1', 'smooth2', 'subdivide1', 'transfer_Color1', 'smooth4', 'set_NY_ZERO', 'merge1', 'peak1', 'transfer_Color2', and 'ar_redir'. The 'transfer_Color2' node is highlighted with a blue circle. The top toolbar shows the 'Group' menu with 'Brush', 'Symmetry', and 'Stroke' options. The 'Operation' dropdown is set to 'Comb Normals' with a 'Comb Lift' value of 0.15 and 'Keep Normal Length' checked. The 'Tree View' tab is active, showing a hierarchy of objects including 'Water'.

The SIGGRAPH 2010 logo, featuring a stylized red and blue sphere with a white ring, set against a light blue background.

A screenshot of the Houdini software interface. The main viewport on the left displays a 3D mesh with red and blue lines, representing a complex surface. The right panel shows the 'Node Network' editor. The 'Group' dropdown is set to 'Stroke'. The 'Operation' dropdown is set to 'Comb Normals'. The 'Comb Lift' slider is set to 0.15. The 'Keep Normal Length' checkbox is checked. The 'Tree View' tab is active, showing a hierarchy of nodes: 'smooth5', 'facet4', 'ar_mixAttr1', 'take_newColours', 'ar_mixAttr3', 'READWRITE', 'set_NORMAL_TC', 'Scale_Unit', 'FinalRotations', and 'RENDER'. The 'READWRITE' node is highlighted with a green circle.

The SIGGRAPH 2010 logo, featuring a stylized red and blue sphere with a white ring around it, set against a light blue background.

A screenshot of the Houdini software interface. On the left, a 3D viewport shows a blue, wavy water surface. On the right, the node network is visible, showing a sequence of nodes: 'BaseGrid', 'Translation_and_Scale_to_desired_Height', 'CreateWaves' (containing 'Low_Frequency_Waves' and 'High_Frequency_Waves'), 'ProcessNormals', 'putNormalToColour', and 'Point_geoNormals_to_Camera_for_Render'. The 'ProcessNormals' node is highlighted with a green border.

A square image showing a blue and purple wavy pattern, representing a normal map. The pattern consists of small, irregular waves and ripples, typical of a water surface normal map.

The Valve logo, featuring a stylized 'V' with red and blue curved lines, set against a blue and white background.

The SIGGRAPH logo consists of a stylized, three-dimensional 'G' shape. The 'G' is formed by two interlocking loops, one colored red and the other blue. Below the 'G' is a glowing blue circular base that emits a soft light.

A square image showing a dense, grayscale noise texture, commonly used in computer graphics for procedural generation.

A square image showing a flow texture. The texture has a color gradient from dark green on the left to orange in the center to light green on the right. Overlaid on the texture are several white arrows indicating flow direction: a short arrow pointing down on the far left, a long arrow pointing down in the dark green region, a short arrow pointing down in the orange region, a short arrow pointing up in the orange region, a short arrow pointing down in the light green region, and a long arrow pointing down on the far right.

The SIGGRAPH logo, featuring a stylized 'G' composed of red and blue curved lines, with a blue sphere at the bottom.

A color map for the flow texture, showing a gradient from dark green on the left to dark green on the right, with a bright orange-red center.

The logo for SIGGRAPH 2010, featuring a stylized, three-dimensional 'G' in red and blue, with a glowing blue base and a red ring around it.

A stylized logo consisting of a red and blue swirl or 'G' shape, possibly representing a portal or a stylized letter. It has a glowing blue base.

A screenshot from the game Portal 2 showing a test chamber. The chamber is filled with dark water. In the center, there is a small, dark, rectangular object floating. To the left, a large, dark, rectangular structure is partially submerged. The walls are made of grey, corrugated metal panels. The floor is dark and reflective.

The SIGGRAPH logo, featuring a stylized, colorful sphere with red, blue, and white segments, surrounded by a glowing blue ring.

A small inset image showing a 3D visualization of flow vectors. The scene is a simplified version of the main image, with a blue floor and a black cube. The floor is covered with a color gradient from red to green, representing the magnitude of the flow vectors. The black cube is positioned in the center of the floor.

The SIGGRAPH logo, featuring a stylized red and blue sphere with a white ring, set against a blue and white background.

A small inset image showing a 3D visualization of flow vectors. The scene includes a blue cube and a larger black structure on a blue surface. The flow vectors are represented by a color gradient from red to green, indicating the direction and magnitude of the flow.

The Valve logo, featuring a stylized 'V' with red and blue curved lines and a blue glow at the bottom.

The SIGGRAPH 2010 logo, featuring a stylized globe with red, white, and blue curved lines representing the Earth's latitude and longitude, set against a light blue background.

A small 3D visualization showing flow vectors on a surface. The surface is colored with a gradient from red to green, and a small black cube is placed on it. The flow vectors are represented by small red arrows pointing in various directions.

A small 3D visualization showing a normal map. The surface is colored with a gradient from red to green, and a small black cube is placed on it. The normal map is represented by a small red dot on the surface.

The Valve logo, consisting of the word "VALVE" in a bold, sans-serif font, with a registered trademark symbol (®) to the right.

A large 3D visualization showing a single layer of repetition. The surface is covered in a dense, repeating pattern of red and blue dots. A small black cube is placed on the surface. The background shows a dark, textured wall and a dark floor.

A 3D rendering of a dark, industrial interior space. In the center, there is a large, dark, rectangular object with some glowing elements on top. In the foreground, there is a smaller, dark, rectangular object. The floor is covered in a dense, noisy texture. The walls are made of dark, rectangular panels.

A close-up view of a noisy texture, showing a dense, granular pattern of black and white pixels.

The SIGGRAPH 2010 logo, featuring a stylized red and blue sphere with a white ring, set against a blue and white background.

A visualization of flow vectors in a pool, showing a color gradient from red to green. The red area is near the source of the flow, and the green area is further away. The flow vectors are represented by small arrows pointing in the direction of the flow.

A visualization of a noise texture in a pool, showing a grayscale gradient. The texture is applied to the water surface, creating a realistic, rippling effect. The texture is represented by a small, dark, rectangular area.

The VALVE logo, featuring the word "VALVE" in a bold, sans-serif font, with a registered trademark symbol (®) to the right.

A large, abstract visualization of a debris flow. The image shows a turbulent, swirling mass of material in shades of green, yellow, and orange, suggesting a complex, chaotic flow pattern. The top left corner shows a dark, textured surface, possibly a wall or floor, with a grid pattern.

A smaller, square visualization showing a dense, granular texture of the flow. It features a complex, swirling pattern of green, yellow, and orange, with many small, dark, circular features scattered throughout, representing individual particles or debris within the flow.

The SIGGRAPH logo, featuring a stylized 'G' with red and blue curved lines and a blue base.

A visualization of flow vectors, showing a color-coded map of flow direction and magnitude. The colors range from green (low magnitude) to red (high magnitude), with arrows indicating the flow direction.

A dark, atmospheric scene of a flooded room. The walls are covered in large, square tiles, some of which are dark and others light, creating a checkered pattern. The floor is also tiled and is partially submerged in dark, rippling water. In the foreground, a long, dark wooden table sits on the floor. On the table, there is a glowing white orb, a small white box with a black symbol, and a small white box with a black symbol. In the background, a bright light source, possibly a window or a doorway, illuminates the scene, casting a strong beam of light across the water and the walls. A small, dark, rectangular object is visible on the wall near the light source. The overall mood is mysterious and eerie.

A small, dark wooden cabin with a gabled roof is partially submerged in murky, brown floodwater. The cabin is situated in a dense forest of tall, slender trees. Several large, thick tree trunks are visible in the foreground, their lower portions underwater. The water surface is rippled, reflecting the overcast sky. The overall atmosphere is somber and desolate, suggesting a scene of environmental devastation or a remote, isolated settlement.

The logo for SIGGRAPH 2010, featuring a stylized 'G' composed of red and blue curved lines, with a glowing blue base.