PBP-1, documents, description in-game realization.

[ROSS_BerryMORE]

Dear virtual pilots! 

Some guys collect info about sights  and make mod for soviet sight PBP-1, which not correctly modeled.

This mod contains next changes for in-game sight:

1.     Geometrical parameters of the reticle (form and width of lines, amount of aberration (not sure if this correct definition for glowing edges of the reticle) – for this changes was used real sights in museum and manuals as reference. Like this:

2.     Color of the reticle set as on real sight with ambient backlight.

3.     Color of the dimming screen set as on original real sight.

 

 

Let see which realization (default or mod) more close to the real sight.

Let compare performance of the sights in the boundary condition of the backgroung lighting: against the sun, on bright background, at dusk or dark background and at night.

 First, we note two most important features of the sight PBP-1 (ПБП-1):

1.      With ambient light, brightness ratio of the reticle to background is permanent:

(there is translated text of the document)

1^st box: Feature of the ПБП-1 is backlight of the reticle using ambient light. No need use lamp for backlight during the day.

Underlaying: at the night using lamp with power 0.15 watt – this is less than 100 times than lamp in ПАК-1 sight.

2^nd box: ambient  backlight during the day provide clear visibility of the reticle in any attitude of the plane and any background condition.

3^rd box: brightness ratio of the reticle to background is permanent. So the reticle is never disappear (as in ПАК-1). The brighter background gives the brighter reticle.

 

And the reticle constantly visible on any background with ambient backlight.

2. Night red backlight of the sight is not visible at the day, cause lamp is not so powerfull - 0.15 Watt. There is some kind of calculations of lighting parameters.

 

Let see how it must work in the game:

https://youtu.be/7LZKR0NZNuw

Slides:

1. 0:08 real sight. Compare to the in-game sight.

2. 0:53 Inconsistencies:

              1. Ingame reticle disappear at bright background - must be visible on any

              2. Color of the reticle - red. But it must be red only at night and only after october of 1942.

              3. Reticle has glowing of the edges - real sight did not have it.

              4. Dimming screen did not have the same color and contrast as real sight.

3. 1:46 Inconsistencies: white uneven backlight reticle. Minimization of intensity and lighting gradients of the reticle texture.

             Red text tells about that switch to night backlight can be done when turn on cabin backlight just using red colored texture.

             Minimum of backlight at night uses to prevent pilot blindness - at night sky any other source of light can not be spotted if backlight will be on maximum. 

4. 2:00 Main feature of the PBP-1 is:

             Brightness ratio of the reticle to background is permanent. So the reticle is never disappear. The brighter background gives the brighter reticle.

             This mod shows that is can be implemented. Please realize it in the game.

 

So, as you can see, modded sight is closer to original sight than in-game version.

And keep in mind that in-game REVI sight uses during night – backlight for the DAY, not as used for the night…

Spoiler

… with the red filter, as it was in the real sight.

 

Reticle did not disappear when you look against sun – so using of the dimming screen as in real life is not necessary anymore:

Spoiler

 

Bright background:

Spoiler

 

.., the limitations of the modded sight PBP-1 is not worse than limitations of the in-game REVI sight.

 

In a real sight, a lens with a mask of the reticle, like a camera lens, looks at a target. And the pilot also looks at the target, only through a slightly darkened reflector. The image of the reticle is the difference in the brightness of the image of the target that has passed through the reflector filter and the brightness of the image of the target, bypassing the reflector.

This differences of the brightness of the images always the same.

At the day and at the night. In the shadows and in the clouds.

 

Usage of the lamp constantly is not allowed by the manuals and most important cause – night backlight simply can't be seen during day.

So, using red backlight for a sight during the day not correct.

 

This mod just for check how sight can be modeled much close to the real sight. No need special ray tracing technology for that.

But developers need to make some corrections:

1)      Make uneven reticle mask for “DAY” with sharp-edges. 

2)      Make two color of the reticle – for DAY and for NIGHT, which can be chosen as unlock, or selected automatically if there night time of the mission, or turning on cabin/instruments lighting.

For the “night reticle” is just need to replace color of the reticle texture from white to red.

 

Anyway, everybody can download this mod and test it. This material I`m copied from russian forum, hope developers take a time and make some corrections to the game sights.

In attachment you can find table with information about sights parameters. 
 

 

 

 

 

 

 

Edited December 16, 2018 by ROSS_BerryMORE