Low Poly Hair Alpha Map Transparency Problem

[angryoreo]

woahh thanks

[duncanbrinsmead]

Just a thought... try turning off uv "wrap" on the texture placement node.

Duncan

[dryo]

And/or assign the Repeat values to something like 0.95.

Maya's behavior in this area seems odd. I get this sort of thing all the time, especially with ramps.

[duncanbrinsmead]

When you have wrapping textures sometimes the texture filtering, which is like a blur based on the sample size, pulls in pixels across the wrap boundary( which technically it should, although sometimes it creates confusions ).

Duncan

[dryo]

Right, I had figured that was the case. But I wonder why it doesn't happen in 3ds Max? Or at least it never happened to me. Maybe the filtering is done before the tiling in Max, and it's the other way 'round in Maya? But if that were the case, one would expect to see aliased pixels at the tiling boundaries in Max, but I don't remember ever seeing that.

[joojaa]

QUOTE(Aaron Ross @ 10/17/07, 04:21 AM) [snapback]274975[/snapback]
Right, I had figured that was the case. But I wonder why it doesn't happen in 3ds Max?

Default settings are different*? Or then max assumes that the user does not tile if the tiling is 1,1, can you do this assumption? Well not quite, if you look at some really high end renderer's like prman they behave the same if you say it wraps. Now why would that be?

Well it so happens that the model might have a final say so, so for instance the modeler made plane with many 0 to 1 uv texture tiles on it, these tiles would then repeat over the seam (or they continue form nurbs object to nurbs object),and thus need filtering as if they were tiled because they are on the model itself. this provides a slight boost in render times, and more accurate control over the problem.

Its just a fundamental design difference, in max its generally assumed user does not know what hes doing in maya he is.

So if the user says hes tiling he is assumed to be tiling! NB it can be veruy infuriating to fight against heuristics that are far stupider than you are, preference over computer being my slave not my master

*The default could be off! because if the user can change the tiling values its assumed he can turn tiling off too. But again it depends on what the suers do mostly.

[joojaa]

QUOTE(Aaron Ross @ 10/17/07, 04:21 AM) [snapback]274975[/snapback]
Right, I had figured that was the case. But I wonder why it doesn't happen in 3ds Max?

Default settings are different, or then max assmes that the user does not tile if the tiling is 1,1, can you do this assumption ? Well not quite, if you look at some really high end renderer's like prman they behave the same if you say it wraps. Now why would that be?

Well it so happens that the model might have a final say so, so for instance the modeler made plane with many 0 to 1 uv texture tiles on it, these tiles would then repeat over the seam (or they continue form nurbs object to nurbs object),and thus need filtering as if they were tiled because they are on the model itself. this provides a slight boost in render times, and more accurate control over the problem.

Its just a fundamental design difference, in max its generally assumed user does not know what hes doing in maya he is. So if the user says hes tiling he is assumed to be tiling! NB it can be veruy infuriating to fight against haurestics that are far stupider than you are, is especially good at this stuff.

QUOTE
Maybe the filtering is done before the tiling in Max,

You mean after? Well you could possibly do that for file textures (but the mipmaps would then be built wrong), but you'd loose performance. And it wouldn't work for procedurals which have to calculate the are integrals internally. You could super sample but thats just way slow for getting a inferior result.

Or you could guess... better ask the user. It again depends on what you think of yoru user base.

[kerokura]

I also have this problem. I tried everybody(above me)'s advices but all failed....
Any other advices? wahhh