{"id":910,"date":"2010-11-23T11:50:27","date_gmt":"2010-11-23T11:50:27","guid":{"rendered":"https:\/\/www.cg-blog.com\/?p=910"},"modified":"2013-04-15T09:34:23","modified_gmt":"2013-04-15T09:34:23","slug":"save-memory-rendering","status":"publish","type":"post","link":"https:\/\/www.cg-blog.com\/index.php\/2010\/11\/23\/save-memory-rendering.htm","title":{"rendered":"How to save memory for the rendering"},"content":{"rendered":"

\"\"<\/a><\/p>\n

( Render: Alessio Fiorini – He attended my training. \u00c2\u00a0This work inspired the current post <\/em>)<\/p>\n

Some months ago I wrote about improving render setting time: how to reduce rendering time<\/a>.<\/p>\n

In this post I’m going to talk about how to save memory in order to avoid any crash<\/strong>. 3ds max could crashes during the rendering due to a lack of memory.. so we need to have some strategy to save as much memory as possibile. Here my suggestions:<\/p>\n

* * * SAVE IRRADIANCE MAPS * * *<\/strong><\/p>\n

During the rendering, global illumination informations are stored and reused for the same render. We can easily calculate only the first part of the global illumination: irradiance maps<\/strong>. Save datas and reload them using “from file” option.<\/p>\n

    \n
  1. Check “Do not render final image”<\/li>\n
  2. Click render and wait for it to calculate<\/li>\n
  3. Go to the irradiance map and click “SAVE” then save it<\/li>\n
  4. Choose “from file” and select the file you just saved<\/li>\n<\/ol>\n

    \"final<\/p>\n

    \"irradiance<\/p>\n

    Do the same saving the light cache datas<\/strong>: the procedure is identical.<\/p>\n

    Then uncheck “do not render final image” and run the final rendering.<\/p>\n

    .<\/p>\n

    * * * IRRADIANCE MAP FOR BIG IMAGES * * *<\/strong><\/p>\n

    For images to screen size (1200 x 750 for example) is fine to use HIGH\u00c2\u00a0preset for irradiance map.\u00c2\u00a0But when you render images for posters of 6000 x 4000 this approach is far more than necessary.\u00c2\u00a0It may be good to set min and max rate values manually.<\/p>\n

    – IRRADIANCE MAP for posters:<\/strong>
    \n– Min rate = -7 \u00c2\u00a0\/ \u00c2\u00a0Max rate = -4<\/p>\n

    .<\/p>\n

    * * * USE STORE WITH IRRADIANCE MAP (V-RAY LIGHT) * * *<\/strong><\/p>\n

    Without the check on “store with…” shadows are sharper and more true.<\/p>\n

    But I advise you not to apply it to all the lights! \u00c2\u00a0Check locally about what lights you need this sharpness of shadows, while the other uses “store with…” option. This save a lot of time!<\/p>\n

    For the lights in the center of a large room – for example – you can safely use “store”.<\/p>\n

    \"store<\/p>\n

    .<\/p>\n

    * * * IMPROVE DISPLACEMENT MAP * * *<\/strong><\/p>\n

    Especially if you’re applying to a rock, you risk to get a very dotted result. Actually we should not improve the displacement setting, is likely to need the support of NASA! A first step is simply to improve the displacement map<\/strong>.<\/p>\n

    Please, read my previus post: How to get a perfect displacement map<\/a><\/p>\n

    \"\"<\/a><\/p>\n

    .<\/p>\n

    * * * RUN A LOCAL TEST * * *<\/strong><\/p>\n

    Do a local test to verify that any approximation does not affect the quality of the final result. Many times, you can accept a small loss of quality when this is a great saving of time! It happens more often than you think.<\/p>\n

    Use region render<\/strong> to run local tests. CROP Render<\/strong> is more comfortable for large images.<\/p>\n

    \"crop<\/p>\n

    .<\/p>\n

    * * * RUN THE FINAL RENDER ON A RENDER FARM * * *<\/strong><\/p>\n

    When everything is perfect but you are in hurry, use a render farm! Is the best solution.<\/p>\n

    How it works? How it costs? An average price for a render farm is 10cents per hour. It means that 1 machine (1Ghz processor) working for 1 hour, costs 10 cents.<\/p>\n

    The renderfarms usually have workstations with 8 cores (more than 20Ghz in total) so if 1 workstation works for you for 1 hour it will cost aroud 2.2 dollars. It’s great isn’t it?<\/p>\n

    It’s not expensive but you have to take care about your setting, everything! You risk to let working 100 workstation for 1 hour… total = 220 dollars and the image is not complete yet!!!<\/p>\n

    This example is rare to happens.. but you can’t use super high settings without brain, because the optimization is a fundamental step for your work, everything!<\/p>\n

    Optimizing a scene must be your mantra<\/em>,
    \nboth on your PC than on a Render Farm.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

    In this post I’m going to talk about how to save memory in order to avoid any crash. 3ds max could crashes during the rendering due to a lack of memory.. so we need to have some strategy to save as much memory as possibile. <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false},"categories":[60],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.cg-blog.com\/index.php\/wp-json\/wp\/v2\/posts\/910"}],"collection":[{"href":"https:\/\/www.cg-blog.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cg-blog.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cg-blog.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cg-blog.com\/index.php\/wp-json\/wp\/v2\/comments?post=910"}],"version-history":[{"count":0,"href":"https:\/\/www.cg-blog.com\/index.php\/wp-json\/wp\/v2\/posts\/910\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.cg-blog.com\/index.php\/wp-json\/wp\/v2\/media?parent=910"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cg-blog.com\/index.php\/wp-json\/wp\/v2\/categories?post=910"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cg-blog.com\/index.php\/wp-json\/wp\/v2\/tags?post=910"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}