This is a suggestion of a new block producing simple laser dot illumination. This idea can be expanded further for another uses such as measurement or rangefinder. Motivation: To be able to analyze position of the ship or its part. Making precise drilling, welding, grinding, connecting, landing, (and weapons targeting) easier. Current situation: Manually controlled weapon launchers (Gatling guns and missiles) do this* as side effect. It helps targeting. But it is overkill to install expensive and bulky gun just for targeting. * - I think it works this way from the videos. I have not used weapons in SE yet. Suggestion: Make a 1x1x1 block or placeable artifact-like equivalent of interior light. This would work as light (laser source) without beam visible** producing dot at the first surface it hits. As we already use green (532 nm?) and red (632.8 nm?) lasers for weapons targeting/target searching, this "engineering laser" could be blue or yellow (447 nm or 589 nm respectively) to stress its non-combat use. And it should not be tunable to other colors by players. Function: Imagine bigger small ship with connector on its front side, but not extended. So it is not visible from cockpit and you have to estimate its position. If there is laser-pointer block just beside connector, targeting will be much easier even from 1st person cockpit view, without switch to 3rd person, multiple view rotating, adjusting, etc. No switching of cameras needed for such simple task as connecting the ship. If there are two laser pointers on the both sides of connector then it is even better and it would look good. Cross (Von Neumann neighborhood) formed from 4 points would be even better, complete Moore neighborhood with eightpoint square would be probably overkill. ** - I wonder why targeting lasers of automatic turrets produce visible beams like high-power laser pointer in atmosphere. It is nice, sure. But there is no dispersive medium in space, beams should be invisible in vacuum! More functions: You can have a grid of multiple drills (or grinders) and put laser-pointers only in its four corners to target operation. It can help you with landing (in 3rd person view or with camera). Also precise alignment of large scale structures (e.g. when building cooperatively) is possible. Problems: Range. ... Until what range should the laser dot (collision of the beam with obstacles) be calculated? To what range should it be rendered? Should it behave realistically if it travels through debris field of floating ore and small components (interrupting the beam and displaying the dot on the individual stones as they pass by)? In reality in vacuum, the range is almost unlimited! Strict range limitation for laser dots is unphysical§. Imagine pointing gravity-powered straight-line-traveling kinetic missile*** device with laser-pointers on sides (cross configuration) onto enemy base several (tens of) kilometers away. With remote controlled spy drone next to that base looking for the dots - deadly combo! Should the dots be detectable by the enemy automatically? Should some laser absorbing materials exists? Should "fake dots" blocks exists? Would it not be too computationally difficult with every player creating multiple laser dots? (And some experiments like pointer on rotor to test angular velocity limit and break speed of light, multiple erratic "disco" pointers with thrusters rotating uncontrollably.) What about light pollution and "too many lasers" problems - custom colors would make things even worse. *** - Because this will be weaponized by the players (as every invention and device). § - And Realism => Gameplay (that means implies) Actually I might have an idea for some of the problems. It is diffraction (due to aperture even in vacuum). Laser light will form Airy disc ( https://en.wikipedia.org/wiki/Airy_disk ) for the larger distances (L > r^2/lambda , where L is distance, r is diameter of the aperture and lambda is wavelength). So at higher range you will have a larger spot, then a disc and then the intensity would be too low to observe§§. This also resolves targeting far objects, because if you point laser pointer at faraway base or ship it will be completely illuminated (or at least large, very noticeable disc formed) and enemy warned. Even further, light will not be noticeable as the illumination decreases quadratically with distance. §§ - I think the best current (earthbound) lasers can make a disc several km in radius on the Moon, not smaller. (see second picture here https://what-if.xkcd.com/13/ ) I have other ideas for this, but I will expand them in the next post.