The following notes were taken from the Tuesday, February 14th, 2023 Simulator User Group (SUG) meeting. They form a summary of the items discussed and is not intended to be a full transcript. A video of the entire meeting is embedded at the end of the article for those wishing to review the meeting in full – my thanks to Pantera for recording it.
Server Deployments
On Tuesday, February 14th 2023, the simhosts on the Main SLS channel were restarted without any change to their simulator code, leaving them on release 577734.
On Wednesday, February 15th, 2023:
The majority of simhosts on the RC channel will be restarted without and version change.
The BlueSteel RC will be updated with release 578100, comprising:
New function llReplaceSubString(): find and replace instances of one substring with another string
New function llHMAC(): generate the HMAC hash of a message
New function llSignRSA(): generate an RSA signature of a message, given a private key
New function llVerifyRSA(): validate whether an RSA signature for a message is valid, given the public key
New parameters for llGetEnv(): “grid” and “region_rating”
The BlueSteel deployment further includes a fix for BUG-233288 “Scripts do not operate properly under this new server version 577942”. This was cause of the February 1st, roll-back as described in this official blog post.
Available Official Viewers
On Monday February 13th, 2023, the PBR Materials project viewer updated to version 7.0.0.578161, February 14, 2023. This viewer will only function on the following Aditi (beta grid) regions: Materials1; Materials Adult and Rumpus Room 1 through 4.
The remaining official viewer pipelines stay as follows:
Release viewer: Maintenance Q(uality) viewer, version 6.6.9.577968 Thursday, February 2, 2023.
Performance Floater / Auto-FPS RC viewer, version 6.6.9.577251, January 4, 2023.
Project viewers:
Puppetry project viewer, version 6.6.8.576972, December 8, 2022.
In Brief
The new Group Chat functionality is currently available in the Maintenance R (above) is also being picked-up by some TPVs. The hope at LL is that once the capability has been available for a while, it will be improved (e.g. allow Group owners set their own parameters for it.
The code branch which provided the Group Chat history code also contains code which allows for text chat translation. If an external translator is correctly configured, the viewer can send a translation request on receipt of a foreign language group chat. This has yet to be implemented.
LL have received requests from residents to be able to submit changes to the XML file used to provide the content for the hover tooltip when writing LSL scripts. This work may be carried out in the next quarter, and the file may be converted to JSON.
The SL wiki has been unavailable for some, apparently as a result of a CDN issue.
It’s time to highlight another week of storytelling in Voice by the staff and volunteers at the Seanchai Library – and this week previews the launch of a very special event.
As always, all times SLT, and events are held at the Library’s home in Nowhereville, unless otherwise indicated. Note that the schedule below may be subject to change during the week, please refer to the Seanchai Library website for the latest information through the week.
Monday, February 13th, 19:00: Robin Scott’s The Big Connection
A scientist develops a rabbit, “Rabbit Number 9”, a highly intelligent variant of the fast breeding species. And not intelligence in rabbit terms, but human terms.
With Gyro Muggins.
Tuesday, February 14th, 19:00: A Universe of Love – Words and Music
Thursday, February 16th, 19:00: Tristan and Iseult, Part 2
Tristan and Isolde (with Husdent) by Hugues Merle (c. 1870)
Perhaps best known as Tristan and Isolde in English – although it has had numerous names down the ages, Tristan and Iseult is a tale which has been told in many forms since the 12th century. It has had a lasting impact on Western culture, with its many versions told and re-told across Europe from the Middle Ages onwards. A chivalric romance, the story is based on a Celtic legend (and possibly other sources), it tells the tragic story of the illicit love between the Cornish knight Tristan and the Irish princess Iseult.
After the defeat of the Irish knight Morholt and his army, largely as a result of his efforts, young Prince Tristan is dispatched to Ireland by his Uncle, King Mark of Cornwall. His mission is to escort the fair Iseult back to Cornwall that she might be married to King Mark and therefore seal a lasting peace between the two kingdoms. However during their return journey, the two ingest a love potion – possibly accidentally, possibly deliberately – and fall deeply in love. Their affair continues after their arrival at the court of King Mar and Iseult’s marriage to the king – something which can only end in tragedy.
Logos representative only and should not be seen as an endorsement / preference / recommendation
Updates from the week through to Sunday, February 12th, 2023
This summary is generally published every Monday, and is a list of SL viewer / client releases (official and TPV) made during the previous week. When reading it, please note:
It is based on my Current Viewer Releases Page, a list of all Second Life viewers and clients that are in popular use (and of which I am aware), and which are recognised as adhering to the TPV Policy. This page includes comprehensive links to download pages, blog notes, release notes, etc., as well as links to any / all reviews of specific viewers / clients made within this blog.
By its nature, this summary presented here will always be in arrears, please refer to the Current Viewer Release Page for more up-to-date information.
Note that for purposes of length, TPV test viewers, preview / beta viewers / nightly builds are generally not recorded in these summaries.
Official LL Viewers
Release viewer: Maintenance Q(uality) viewer, version 6.6.9.577968, promoted Thursday, February 2, 2023- no change.
Burrow Wood County, February 2023 – click any image for full size
Update, April 25th: Burrow Wood County has closed, and Monica has relocated to a one half of a Full region, now home to the twin builds of Burrow Wood by the Sea and Burrow Wood, Road to Nowhere, both of which have been built to Monica’s specification by Teagan Lefevre. SLurls in this article have therefore been removed – please see my updated blog post for more.
Occupying the north-east quarter of a Full region utilising the private region land impact bonus, Burrow Wood County is held by Monica Mercury as a ground-level public space, designed by Teagan Lefevre of Le’eaf & Co fame.
This fictional back-road Tennessee town was inspired by several amazing SL creations visited by the owner, and her real life ventures.
– Burrow Wood County About Land
Burrow Wood County, February 2023
A visit commences at the landing point, tucked into the south-west corner of the parcel and backed against the centre of the region. It is here, a short distance from the mouth of a tunnel from which a rutted track emerges, that the local bus stop sits, helping give the impression that visitors have just arrived by public transport.
From here, the track continues to where a bridge spans the local river; a bridge which marks the track as once having been a single-line spur of the local railroad, and perhaps the bus stop originally an end-of-line rail halt. Beyond the bridge, a dirt track dips down into a small hamlet sitting by the waters of a broad body of water, an off-region surround giving it the appearance of a river.
Burrow Wood County, February 2023
This is a place which has perhaps seen better days; maybe it was once a cosy little fishing village built along one of Tennessee’s many rivers. However, time has not been kind to it, leaving a couple of unpaved roads serving the remaining local businesses, marked by the presence of an ever-hopeful motel, and some scattered dwellings.
Almost all of the local businesses appear given over to food and beverages, from the bar of Frank’s Place through the diner and café shop to Carroll’s Oyster bar and shop, within only a little grocery store trying to break things up. Their presence suggests the motel may do better business than might at first appear to be the case, even if the entrance to one room is boarded up; or perhaps this sleepy little fictional corner of Tennessee is still popular among the fishing fraternity and holiday makers.
Burrow Wood County, February 2023
The latter point may be borne out by the presence of the little office sitting across from the motel proper. It sits ant the entrance to a small group of cabins and trailers sitting alongside one of the water channels. The OFFICE sign hanging on one of its outer walls suggests it is from here that the cabins and trailer sitting on the bank of the river beyond are available for rent by visitors who also likely contribute to the seasonal well-doing of the local businesses.
Ramshackle it might be, but the village still boasts a Sheriff’s Office, and there is no doubting it has a gentle photogenic air about it. The large pool sitting at the head of the river (which may have borrowed its name from either the song as a little joke – you do have to cross the river Jordan in order to reach the hamlet – or from neighbouring Virginia’s river of the same name), is apparently open for swimming, whilst kayaks are moored alongside what appears to be a rentals hut built on a deck extending over the edge of the water.
Burrow Wood County, February 2023
Those following the grassy path down to and around one side of the pool can make their way to where nature is slowly reclaiming the remnants of an old waterside barn – although a local artist also appears to be claiming it for their own use! Further back in the undergrowth lies an old schoolhouse in a greater state of being overwhelmed by mother nature.
Expressive and photogenic, Burrow Wood County is a pleasant, easy-on-the-eye visit.
For February 2023, Cica Ghost invites us all to visit her Happy Place, where we can all relax and have a little fun, wander through an exotic landscape and meet the equally exotic populace.
This is very much a green land, caught under a green sky, between which green-tinged clouds scud whilst on the ground spots and splashes of other colours might catch the eye and cause feet to wander. This ground is a strange mix of grass-like covering and what appears to be a natural quilt forming an interesting patchwork effect as it stretches over the humpbacked hills and lies on the flatter ground like a picnic blanket. Blue splotches within the quilt suggest pools of water – albeit sometimes at odd angles as the effect stretches itself over the uplands.
Across both grass and patchwork can be found tall grasses and clovers rising up taller than an avatar, smaller flowers of red and yellow and green scattered around them and across the landscape as a whole (some of which have much larger brethren away to the north of the setting) while trees in places rival the humpy hills in height.
Cica Ghost, Happy Place – February 2023
Nor is the shape of most of the hills their only distinguishing feature; many have had their tops sliced flat, allowing little houses and matching trees to sit upon their crowns (some have other little places sitting on their heads, but you should discover this for yourself). Some of these houses appear unreachable such is the steepness of the slopes rising to them; others can be more easily reached, thanks to the placement of ladders to assist with climbing.
Also across this strange yet welcoming landscape can be found the setting’s inhabitants. From sheep to bipedal monsters, passing by want of ants, ladybirds, a sleeping dragon, elephants and a Cica-like little girl tending a lone cow with what appears to be her cottage and pet fish close by. There’s even the suggestion, spread between two trees, that the setting might also be home to a giant human, although they appear to currently off visiting somewhere else!
Cica Ghost, Happy Place – February 2023
Although some are monsters, none of the inhabitants are in any way dangerous; the dragon snoozes peacefully and the monsters all appear to be here for the same reason as anyone else: to take in the scenery, to relax together and pose for photos and / or simply have fun. And given this is a build by Cica, there are obviously places for visitors to enjoy a little dancing, or to sit and pose for photos or to simply spend time together, both on the ground and in the air.
The setting comes with a popular quote which is often attributed to A.A. Milne / Winnie the Pooh. In fact, the words as given were never given to Pooh (or any other of Milne’s characters) to say within the books (although they may have been spoken in one of Disney’s film adaptations). But whether written direct by Milne or by a screenwriter really matters not; they encapsulate the magical wonder of childhood and the importance of never letting go of that sense of magic and wonder, but allowing it to permeate our lives in moments of fun, friendship and togetherness.
By allowing us into her Happy Place, Cica again invites use to to do just that: let the magic and wonder free as we explore, have fun with friends and share our time with them.
The moment of ignition: 31 Raptor motors ignite: Booster 7 during its full static fire test, February 9th, 2023. Credit: SpaceX
SpaceX has completed the largest static fire test for this Starship / Super Heavy launch system, with the 70-metre tall Booster 7 – expected to be part of the first orbital launch attempt – completing a “full duration” 5-7-second test of 31 of its 33 Raptor 2 engines.
The test was made on Thursday, February 9th, amidst on-going work at the orbital launch facilities at the company’s Boca Chica, Texas Starbase site. It had been intended to be full 33-engine test, but one engine was “turned off” during a pause in the countdown at the T -40 second mark, presumably due to an issue being detected, and a second automatically shut down at, or immediately following, ignition.
Even so, the burn was enough for the SpaceX CEO to proclaim the 31 firing engines developed sufficient thrust that, if sustained throughout an 8-minute ascent, it would be enough for Super Heavy to push a fully laden Starship to an altitude where it could reach orbit under the thrust of its six engines.
Ignition came at 21:13:53 UTC, after a partial filling of the booster’s liquid methane and liquid oxygen tanks – Starship 24 had already been destacked from the booster earlier in the month, leaving just the booster on the launch table. Everything appeared to go well, with SpaceX afterwards reporting the engines reached a peak thrust of 7,900 tonnes, or almost twice that generated by the Space Launch System Block 1/1A launcher, and 3,000 tonnes more than the Block 2 SLS cargo launcher.
However, such comparisons need to be put into context: Super Heavy must lift 1200+ tonnes of Starship to low-earth orbit (LEO), carrying 100 tonnes of cargo. SLS is already capable of lifting 95 tonnes of payload to LEO if required, which will increase to 105 tonnes and then 130 tonnes. It is also capable of delivering 27 tonnes to cislunar space, which will increase up to 46 tonnes. The flipside is that Starship and its booster are fully reusable, lowering launch costs; SLS is not. Also, if the booster is not re-used, they Starship could in theory life up to 250 tonnes to LEO; conversely, SLS can reach cislunar space, whereas Starship cannot, not without a complex series of on-orbit refuelling operations.
The test came after extensive work had been carried out at the launch facility after the first two Super Heavy static fire tests (with 7 and 14 Raptor motors respectively) literally stripped the concrete from the base of the launch stand, peppering the launch mount and its surroundings with high velocity cement debris and necessitating extensive repairs to the site.
The problem was one of basic engineering (and frankly, something SpaceX should have considered): the launch table legs and apron underneath the rocket are coated in concrete. A key ingredient of concrete is water, some of which is retained in the concrete as pockets of moisture. Heat concrete to 600°C or more, that moisture flash vaporises into expanding gases, causing the concrete to violently explode.
As I’ve previously noted, this risk is usually negated by the inclusion of a water deluge system which delivers thousands of litres of water to a launch facility, serving a dual purpose: it both absorbs the enormous heat generated by multiple rocket motors by flashing into stream by the force of that exhaust, and it also absorbs the sound waves generated by the motors, further preventing that sound being deflected back up against the rocket and potentially damaging it at launch.
Following the 14-engine test, SpaceX replaced the concrete at the launch facilities with a type designed to withstand very high temperatures. At the time of writing, it is not clear how well this mix withstood the engine test, however the test came at a time when SpaceX is – belatedly – attempting to install a water deluge system to work alongside the existing (and minimal) sound suppression system already part of the launch table.
Tanks for a water deluge system arrive at Starbase Boca Chica via barge. Credit: RGV Aerial PhotographyMany – including the SpaceX CEO – are proclaiming the way is now clear for an orbital launch attempt to be made in March. However, this actually depends on a number of factors – the most key of which is whether or not the FAA is satisfied that SpaceX has done / is doing enough to ensure its compliance with all 75 remedial actions specified in its Programmatic Environmental Assessment (PEA).
NASA Tests Upgraded RS-25 Motor
The SpaceX static fire test overshadowed NASA’s test of its updated RS-25 engine for the Space Launch System.
The initial four SLS launches utilise a total of 16 refurbished RS-25 motors originally used with the space shuttle system and referenced as the RS-25D. However, beyond Artemis 4, NASA will be switching to a version of the RS-25 which has been extensively updated. Called the RS-25E, it will deliver 30% more thrust; allowing SLS achieve the upper end of its payload capabilities noted above.
The test, which took place at NASA’s Stennis Space Centre in Mississippi, saw a test stand mounted RS-25E motor fire at 111% of its rated thrust for a total of 8.5 minutes – the amount of time the engines would be used in an actual launch.
A single RS-25E under 1!1% of rated thrust during testing at Stennis Space Centre. The great cloud to the left of the test stand is, in part, steam generated from the engine exhaust striking water from the deluge system Credit: NASA
The RS-25E will commence operations with the Artemis 5 mission in 2028. They will operate alongside the new Exploration Upper Stage (EUS) which will also help raise the SLS system’s performance. EUS itself will entire service with Artemis 4.
Image of the Week
The image below is a computer-generated top-down view of Jupiter and the orbits of its (currently) 92 moons. At the centre of the image is Jupiter and (purple) the orbits of its four most famous Galilean moons – Io, Europa, Ganymede and Callisto. Beyond them, predominantly shown in red, are the remaining 88 moons.
A computer model of the moons of Jupiter in their orbits, with the planet at the centre, as seen from overhead. Credit: Scott Sheppard
Until recently, Saturn held the record for the greatest number of moons (82), the majority of which (43) have been discovered by a team led by astronomer Scott Sheppard. However, Sheppard’s team have also been busy over the years seeking moons orbiting Jupiter – racking up and impressive 70, including the most recent batch of 12 which handed the moon record back to the largest planet in the solar system.
The newest moons were discovered over a period of observations by Sheppard and his team using a number of observatories around the world across 2021 and 2022. They range in size from 1 to 3.2 km across. Most have very large orbits, with nine having periods of more than 550 days. None have been named as yet, as all are awaiting further independent verification.
Inara Pey: Living in a Modemworld 