Downloaded 25 times
Uploaded byFrancisco Peters
Les 2 game 3d - texturing & materials
Textures are bitmap images that contain color or other information that is applied to 3D objects. There are different types of textures including diffuse maps, which contain color information, alpha maps for transparency control, and normal maps that can add detail without additional geometry. Textures can be created from photographs or homemade in software like Photoshop. Photographic textures often look more realistic but provide less control, while homemade textures allow more customization but may not look as realistic. Combining both approaches can produce the best results. Specular maps influence glossiness and reflections.
More Related Content
Similar to Les 2 game 3d - texturing & materials
Les 2 game 3d - texturing & materials
- 2. WHAT ARE TEXTURES? Texturesare bitmaps containing color information, which are applied to a 3D object. • Diffuse map: contains the object’s color information • Alpha map: can be used for transparency control • Specular map: influences the object’s glossiness and reflection (color) • Normal map: can add extra detail without geometry
- 3. CREATING TEXTURES Textures canbe made from (existing) photographic material OR be homemade in Photoshop.
- 4. PROS & CONS– PHOTOGRAPHIC MATERIAL PROS: • Fast results • In most cases looks more realistic • More natural look & feel CONS: • Intellectual property can be a big issue • You have less control over the image • It can be hard to find / take the right picture
- 5. PROS & CONS– HOMEMADE MATERIAL PROS: • Fast results • You are it’s creator, therefore it’s owner • More control over the image CONS: • Can be slow to produce • Not always the most realistic results
- 6. EXAMPLE 1 –HOMEMADE vs. PHOTOGRAPHIC PHOTOGRAPHIC HOMEMADE
- 7. EXAMPLE 2 –HOMEMADE vs. PHOTOGRAPHIC PHOTOGRAPHIC HOMEMADE
- 8. BEST PRACTICE =COMBINING BOTH Go out, smell the air and take pictures, but keep the following things in mind! • Camera angle - try and get the right perspective • Lighting - no flash, use a tripod instead and a longer shutter time!) • Patterns & tiles - when going for tileable textures watch for distinct patterns and spots that might mess up the tileability
- 9. TAKING PICTURES –TILEABLE TEXTURES TILEABLE OR NOT?
- 10. TAKING PICTURES –TILEABLE TEXTURES Nope!
- 11. UVW-MAP AND TEXTURES Textures whichare applied on a 3D model with the help of a UVW-map are called unique textures. UVW-MAP
- 12. SHARING TEXTURE SPACE It’s acommon and good practice to use your UV-space as optimal as you can!
- 13. SHORT TEXTURING ASSIGNMENT Pick a tutorial from the list (see Facebook for link) and create your own homemade texture in 15-20 min Post your final image on FB!
- 14. ALPHA CHANNELS • AnRGB bitmap contains 3 channels: Red, Green and Blue. • Besides these channels that hold color information they can also contain grey scale color information = ALPHA CHANNEL They can be used for multiple purposes but are often used for transparency and masking
- 15. ALPHA CHANNELS - MASKING To mask certain areas of a texture (especially with leafs) you apply 100% white to areas you want to see (opaque), and 100% black to the areas you want to hide
- 16. ALPHA CHANNELS - MASKING In some game engines (like UDK) it’s best to use a separate 24-bit texture for alpha masking as the engine uses more resources if you add the information into a separate channel of your original texture, making it 32-bits.
- 17. ALPHA CHANNELS – GLASS Alpha is great for glass, where you want to have semi- transparency, still leaving a bit visible for the human eye. Tip for your car’s windows!
- 18. LET’S TALK ABOUT MATERIALS.. Sometimesmaterials are confused with textures, which they are not! Materials contain a set of textures and instructions to simulate particular attributes. They often contain what we’ve discussed so far: • Diffuse map • Alpha map • Specular map • Normal map
- 19. SPECULAR MAPS • Influencethe object’s glossiness and reflection • Most game engines use the color info for reflection, but not all
- 20. SPECULAR MAPS - EXAMPLE DIFFUSE SPECULAR
- 21. SPECULAR MAPS Most commonmistake done
- 22. SPECULAR MAPS - EXPLANATION Mostmaterials in real life can be classified into 2 different classes: • Conductors – They conduct electricity, like metals • Dielectrics – They do not conduct electricity, like wood
- 23. SPECULAR MAPS - EXPLANATION Mostmaterials in real life can be classified into 2 different classes: • Conductors – They conduct electricity, like metals and Light reflected by specularity IS affected by the diffuse color • Dielectrics – They do not conduct electricity, like wood. Light reflected by specularity is NOT affected by the diffuse color
- 24. SPECULAR MAPS - EXPLANATION •Metal (conductor) • Wood (dielectrics)
- 25. SPECULAR MAPS - EXPLANATION(just like the layer option in • Specular maps are ADDED Photoshop). This is why only saturation will not be helpful in case of a wooden texture! Want to know more? http://www.manufato.com/?p=902
- 26. SPECULAR MAPS -TIPS • Do not flatten your image and start editing it! • Add extra detail to the specular map for a nice pop • Keep your detail layers (scratches, dirt, etc.) separately to avoid frustration later on • Group and adjust the layers that share the same specularity together • Try and use the Adjustment Layers in Photoshop. They save a lot of time and can be adjusted on the fly.
- 27. NORMAL MAPS Normal mapsare a special category of textures that can add detail to your object without the use of actual geometry.
- 28. NORMAL MAPS –HOW DO THEY WORK? channels in bitmaps to store Normal maps use the RGB height information for the detail. This height information is projected on 3D objects and used for lighting calculations.
- 29. CREATING NORMAL MAPS Easiestway to start is with the nVidia filter, using height maps (grey scale height/depth images): http://developer.nvidia.com/nvidia-texture-tools-adobe-photoshop
- 30. CREATING NORMAL MAPS OrnDo, which is fairly similar but easier to adjust things: http://www.quixel.se/
- 31. CREATING NORMAL MAPS Orimport your model into ZBrush and add detail there!
- 32.
- 33. TIP: Tired of lookingfor good information on the web related to 3D? Try: wiki.polycount.com Always up to date, filled with (good) tutorials and in depth explanations of gaming industry’s experts. Check the forums for high quality 3D work as inspiration ;-)
Editor's Notes
- #2 INTRODUCTION
- #11 Wrong perspective in the tiles (middle) and too many distinctive areas that will need extensive cleaning in Photoshop.
- #14 SHORT TEXTURING ASSIGNMENT – 15-20 MIN!http://beeex.net/photoshop/tutorials-photoshop/77-essential-photoshop-techniques-for-photo-realistic-textures
- #22 NO DESATURATION AS YOUR ONLY STEP IN SPECULAR MAP MAKING!