Cool VL Viewer forum

current viewer with mesh hair doe not rez with alpha in fact it does for a half of a second then the alpha transitions go solid normally seen on others and occasionally on the host AV a rebake will trigger the alpha layer for a second or less

Please be more specific, give the details requested in the rules of this forum...You don't even tell what OS you are using, what version of the viewer, what version of the graphic card drivers, etc... Providing the log, as requested in the rules, would tell me all that and more.
Also, did you test Linden Lab's own viewer and does the bug also occur with it or not ?

Finally, since it's currently very hard to find meshes on the grid, giving a location pointer were to see mesh hair would be helpful.

This sounds like something I noticed since v1.26.0. Right after rezzing, transparent textures like hair or plants look solid in the parts that should be transparent. Sometimes this goes away on its own after a few seconds. But as a workaround I zoom out as far as possible and then zoom back in. Problem fixed. I guess the LOD-change during this is what fixes it. See screenshot for how it looks.

This happens for me on Windows 7, Nvidia 580 with latest drivers. Not just since v1.26.1, but on any version since v1.26.0.

That's another issue (in fact just a slow rezzing texture), that got nothing to do with meshes: you can also get rid of such glitches with a right click on the object (and if it still fails to rez its texture, you can SHIFT CTRL U after right clicked to force a full reload of all textures for that object). Textures may be slow to rez sometimes, because of a slow network, packets losses/retries (check for your network interface MTU: search for this acronym on this forum for details), or an engorged textures server (for HTTP textures). It affects all viewers, and there is nothing to do to solve it viewer side, beside the work arounds such as the CTRL SHIFT U one I implemented in the Cool VL Viewer.

No. The textures in my case are fully loaded. They appear crisp and at full-resolution. The slow-loading caused by packet-losses or similar things looks different. In the latter case the textures look blurry. This is not the case with the problem I mentioned.

But anyway, as I said zooming-out and back in again fixes my problem. Easy enough workaround.

I can definitely second / third this. It has nothing to do with texture downloading, it also happens with fully loaded textures. It seems to happen (not always, unfortunately ) when an object is first rendered, i.e. when it first comes into view, even if an object using the very same texture is already in view, possibly even closer. For example, I have a few bougainvilleas sprinkled across my island, and while one closer will be perfectly rendered, another off in the distance coming into view while panning / turning will show the very symptom described (and shown) here.

And indeed, it is worked around easily enough by zooming out and back in again. So far I have only observed this with hair and plants. Latest 1.26.0 here as well, but under Linux. Never bothered to mention it before since I expected a bit of 'dust' to come up on the way to mesh ...

Just posting this now because I know that sometimes it's nice to know that you're not crazy for seeing things

Love,
Lia