Mesh/Technical Overview

Mesh

• Basics

• Advanced

• Project Information

• Technical Information
  • Mesh asset format
  • Avatar Shape XML Format
  • Calculating land impact
    • Download weight
    • Server weight
    • Physics weight
  • Display weight
  • Mesh technical FAQ
  • Why "UUID Flipping" is bad
• Mesh creation tools

Fact Sheet
Faces	65536 vertices per LOD for each Prim
Textures per Prim	up to 8 texture faces per Prim
Textures per (model-) face	1
Materials per Prim	Materials are currently synonym for texture faces
Objects per Upload	One Object containing an arbitrary amount of Mesh Prims. You will get a Linkset when rezzing the upload. You can separate the Prims within the linkset if you like (just like with any other Linkset). Note that a Mesh Prim can consist of multiple unconnected "sub" meshes. Since a Mesh Prim is the smallest rezzable entity, such a mesh prim is an equivalent to a fractional sculpty from the visual impression, but has a cleanly defined Model. It is up to your tool how you distinguish between separate meshes in ONE object or separate Objects.
Alpha-textures	yes, but take care of the Alpha Sorting issue returning back on meshes.In general alpha textures currently create a mess. However there are some exceptions where they work well.
Normal-textures	Not in first release
Specularity-textures	Not in first release
Environmap-textures	Not in first release
Custom Pivot	(Change the center of a mesh): Not supported in first release
Mesh without physics	not supported (every Object needs a physics definition). Best approach: Use simple physics meshes (A single triangle will do when you are sure that your mesh realy never needs physics)

An overview about the "mesh asset" data format can be found here: http://community.secondlife.com/t5/image/serverpage/image-id/27697i06AB59A4EB4704F1/image-size/original?v=mpbl-1&px=-1

Technical overview should include:

• Summary of how mesh works
• Summary of toolchain
• Differences between existing prim system and mesh