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- Texture Document - 14-Sep-1994
-
- This is a description of the textures I sent to the Imagine Mailing List.
- The textures are freeware and should therefore not be sold.
-
- Have fun with them.
-
- Send any comments to: milan@valkieser.nl
-
- Let your imagination run wild,
-
- Milan.
-
- ====================================
-
- Clipmap Texture
- Type: Reflect, Filter, Bump.
-
- This texture eliminates the specular highlights on parts of objects that are
- totally black. You can use this texture to make plants and fences etc.
- The backlight flag is used to indicate that the lightsource is from behind,
- otherwise it won't work when lit from behind.
- The texture fails when lit from the front and behind at the same time.
- To try, add a sphere, give it specular highlights, add a texture with colour
- value 0,0,0 for the parts that have to be clipped, add the cliptran texture
- and render. It works best with textures.
- Also leave filter values in textures following clipmap to -1, otherwise you
- will get strange results.
- When using brushmaps, be sure to have enough resolution to avoid ugly anti-
- aliasing edges.
-
- Requester:
-
- Backlight: Set to one when the object is lit from the back.
-
- sample object: any object.
-
- ====================================
-
- Cliptran Texture
- Type: Reflect, Filter, Bump.
-
- This texture eliminates the specular highlights on parts of objects that are
- totally transparant. You can use this texture to make plants and fences etc.
- The backlight flag is used to indicate that the lightsource is from behind,
- otherwise it won't work when lit from behind.
- The texture fails when lit from the front and behind at the same time.
- To try, add a sphere, give it specular highlights, add a transparancy map,
- add the cliptran texture and render. It also works with textures.
- Also leave filter values in textures following cliptran to -1, otherwise you
- will get strange results.
- This texture doesn't have anti-aliasing problems and so works great with
- brushmaps.
-
- Requester:
-
- Backlight: Set to one when the object is lit from the back.
-
- sample object: any object.
-
- ====================================
-
- Brghtmap Texture
- Type: Reflect, Filter, Bump.
-
- This texture allows you to make a certain color of an object bright.
-
- This is what you do:
- - Add a texture or brush
- - Add the brightmap texture
- - In the texture enter the color value that has to be bright
- - After that make the object a lightsource, this is IMPORTANT.
-
- The texture also surpresses reflectivity on the bright parts.
- If you make the object a shadow casting lightsource you can alter the filter
- setting of the texture to make the bright parts cast light.
-
- As the texture manipulates the surface normals there are
- some drawbacks:
-
- - it doesn't like specular reflections (check and find out)
- - bright parts have reflection turned of.
- - Use enough resolution for the brushmaps to avoid ugly
- antialiasing edges. (just like with clipmap.itx)
-
- You could add the texture more times for other colors to get
- bright as well.
-
- Requester:
-
- Color Red,Green,Blue: Value of color you want to be bright.
- Filter Ajust (0..1): Transparancy of bright parts.
-
- sample object: any object.
-
- ====================================
-
- Star Texture
- Type: Color, Filter.
-
- This texture simulates star shaped lensflares seen when filming into a
- lightsource.
- To use it, add a primitive plane, rotate the axis so the z-axis is perpendicular
- to the surface, make it bright, set the color to the central star color you
- want, add the star texture and render.
-
- Requester:
-
- Star Radius: Outer radius of star.
- Center Radius: Inner radius of star (set to outer for round flares).
- Number of points: How many points your star should have.
- Fade (0..1): Star fadeout (total intensity).
- Radial Fade (0..1): Star fadeout from center to make more like a flare.
- Edge Red, Green, Blue: Color of edges as star fades out.
-
- sample object: Bright plane with z-axis sticking out.
-
- =====================================
-