{"id":1703,"date":"2017-03-12T21:23:34","date_gmt":"2017-03-12T21:23:34","guid":{"rendered":"http:\/\/spaceengine.org\/?p=1703"},"modified":"2025-11-26T11:05:37","modified_gmt":"2025-11-26T16:05:37","slug":"blog-post-of-12-march-2017","status":"publish","type":"post","link":"https:\/\/spaceengine.org\/news\/blog170312\/","title":{"rendered":"HDR rendering"},"content":{"rendered":"<p>Recently I have working on a proper HDR with autoexposure, and adding a new shiny bloom effect. In process, improved quality of MSAA, and many other things. Now, finally, SE is able to display very large difference of brightmess, and true relative brightness of objects.<\/p>\n<p>Earth and Moon. Relative brightness must be adjusted for all Solar system bodies. More precisely, scripts will have a physical-based parameters for textures calibration. Something like MinPixelBright and\u00a0MaxPixelBright in some physical units like luxes.<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2145%26t%3D1\" \/><\/p>\n<p>Saturn and Titan. No stars visible!<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2146%26t%3D1\" \/><\/p>\n<p>Pluto and Charon. Stars are visible (although their brightness is still not calibrated, so this may be wrong).<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2147%26t%3D1\" \/><\/p>\n<p>Saturn and Mimas with shiny glow.<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2140%26t%3D1\" \/><br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2141%26t%3D1\" \/><\/p>\n<p>Earth's night side. Atmosphere is glowing not in red color, as expected... I have to tweak the atmospheric scattering code. There is a tail of the comet Encke visible in top left (comets brightness is not calibrated yet).<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2155%26t%3D1\" \/><\/p>\n<p>ISS over night side of the Earth. Starry sky, city lights, aurora, clouds and ISS are illuminated with a moonshine. I can use real photos from ISS to calibrate such scene.<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2143%26t%3D1\" \/><\/p>\n<p>When ISS enters sunlight, it looks almost like explosion, until virtual \"eye\" adapts to a high brightness.<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2144%26t%3D1\" \/><\/p>\n<p>Ship's light in the \"night\". Looks too shiny? Radiator's glow is too bright and too hot, it must be separated in its own texture, controlled by the graphics engine.<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2156%26t%3D1\" \/><\/p>\n<p>Engine exhaust looks extremely bright, because its brightness is calibrated for the the next picture.<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2157%26t%3D1\" \/><\/p>\n<p>In the \"day\", engine exhaust is barely visible. This is why its brighness was so extreme. Radiators glow and lights are completely invisible.<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2158%26t%3D1\" \/><\/p>\n<p>Molten planets looks interesting in the Solar system browser.<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2153%26t%3D1\" \/><\/p>\n<p>Glowing lava now looks really \"glowing\" (that is a planet in the sky, but it is so bright compared to the night moon's surface, so it is being overexposed).<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2154%26t%3D1\" \/><\/p>\n<p>\"Interstellar-style\" black hole looks much better with a new bloom.<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2142%26t%3D1\" \/><\/p>\n<p>With HDR, it is now easy to explore extremely bright object such as stars and accretion disks. Autoexposure speed is a bit too slow in this case (and adaptation back to starry sky), I have to derive a better formula.<br \/>\n<img decoding=\"async\" src=\"https:\/\/forum.spaceengine.org\/download\/file.php%3Fid%3D2148%26t%3D1\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Recently I have working on a proper HDR with autoexposure, and adding a new shiny bloom effect. In process, improved quality of MSAA, and many other things. Now, finally, SE is able to display very large difference of brightmess, and true relative brightness of objects....<\/p>\n","protected":false},"author":2,"featured_media":1630,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1703","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/spaceengine.org\/wp-json\/wp\/v2\/posts\/1703","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spaceengine.org\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spaceengine.org\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spaceengine.org\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/spaceengine.org\/wp-json\/wp\/v2\/comments?post=1703"}],"version-history":[{"count":7,"href":"https:\/\/spaceengine.org\/wp-json\/wp\/v2\/posts\/1703\/revisions"}],"predecessor-version":[{"id":8390,"href":"https:\/\/spaceengine.org\/wp-json\/wp\/v2\/posts\/1703\/revisions\/8390"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spaceengine.org\/wp-json\/wp\/v2\/media\/1630"}],"wp:attachment":[{"href":"https:\/\/spaceengine.org\/wp-json\/wp\/v2\/media?parent=1703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceengine.org\/wp-json\/wp\/v2\/categories?post=1703"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceengine.org\/wp-json\/wp\/v2\/tags?post=1703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}