What tools are you using for texture merging? Imagine, you have model with 20 small (200*200) textures and you need to merge it to lets say one big texture (because of performance, one texture and one material is 20x less drawcalls then 20 small textures). I know I can use any 3d modelling tool, but question is, if there is something especially made for such task. Just select 20 textures, it will generate one big texture and do remaping. Technically it is possible, because object already has mapping…
I think its not possble you would need an alien programmer do that kind of a plugin.
Well, technically it is only adding constant to each point of UV map. If i put two 200*200 textures above, coordinates of first texture are same and second UVs are y+200, y+0. So it is possible to do it automatically, question is, if already such tool exists and i would guess that yes.
Sure, simplygon does that, unfortunately cheapest licence is $10k :
http://www.donyalabs.com/simplygon.asp
“Solution: Simplygon’s unique remeshing and retexturing technology can be integrated into scene editor pipelines to automatically create single proxy objects from a large groups of objects. This technology removes the inside of the groups, massively reduces the mesh and object count and reduces complex sets of textures into single texture, resulting in greatly reduced draw calls and material costs.”
Unilod is trying to do the same (join meshes and textures), but if fails in case of more objects.
If you’re in any 3D app, just write a script. In Photoshop, it’s called make contact sheet (if you have 20 256x256’s, images of different aspects will require a more hands on). It will combine all the images into a single image. Take your UV’s, scale them down uniformly to 1/?th (so if you had 4 images in a 2x2, you would scale the UV’s down by 1/2 in both directions). Then offset them all by that number (say 4 rows of 5).
What your trying to make is called a texture atlas. Depending on your 3d app, you can make one, it should be ok. You’ll want to bake your textures at double size, so if you need them at 256, you’ll likely want them to start at at least 512, and create a big texture map of something like 1024x1024 or more - there are also scene baking tools like Flatiron which will do it (for about 500 pounds or something) and you’d endup with better quality, but it can be done with most modeling apps.
I tried many apps and they all have problems with tiling textures, even if they claim that they can handle it. Even flatiron does not work well on my models. I looks like I have to do it by hand.
Actually it does exist search Symplygon on the Asset Store
First, you necro posted a thread from 2011 which is long dead.
Second, Simplygon on the assetstore is for automatic generation of model’s LOD’s; which has nothing to do with texture atlases. Which the OP was asking about. If you bring back a thread which is 5 years old; let’s post relevant, accurate information.