Jump to content

Sign in to follow this  

Decrease render time for Glass Object

Recommended Posts



I was wondering how to decrease the render time of my scene. Especially the glass. I'm sorry , can't show the entire image.


Render time per frame: +- 26 minutes

1920 x 1080 resolution


The scene consists of:

- 6 lights (3 gsg softboxes, 1 point light, 1 infinite light, 1 area light)

- 1 main object with glass materials which animates into several boxes (see screencaps)

- MoTexts inside the glass object

- Studio backdrop


Extruded Object + Motext have a fillet of 2 caps over 0,4 radius


I've uploaded my render settings that I've tweaked.


I've read about dropping the specular?

Are there any other tips?


Thanks in advance



render settings.png

tex end.png

Share this post

Link to post
Share on other sites

26 mins is pretty reasonable for a GI scene that size that is full of glass ! Not sure you can get it much faster than that without losing quality.

But do you need so many area lights in the scene ? And do you actually need to use GI ? If so could you explain why ?



Share this post

Link to post
Share on other sites
  • Topic Author
  • With GI on I get more subtle reflections in the edges and between the gaps.


    I use one area light to lit the backdrop. One infinite light to get a distinct green shadow on the floor in front of the object. One point light to create variation in the reflections / specular and create some 'depth feeling' in the glass object since no background elements may be used.

    Share this post

    Link to post
    Share on other sites

    AA try decreasing to max level 4x4 or 8x8.

    Reflection depth... you should get away with 2-3.

    Decreasing ray depth also speedps up rendering.

    I understand this will be an animation? If so,you can choose GI mode that it better suited for  animation. Your chosen mode QMC +LM is quite slow in your case.


    my 2 cents.

    Share this post

    Link to post
    Share on other sites

    Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.

    Reply to this topic...

    ×   Pasted as rich text.   Paste as plain text instead

      Only 75 emoji are allowed.

    ×   Your link has been automatically embedded.   Display as a link instead

    ×   Your previous content has been restored.   Clear editor

    ×   You cannot paste images directly. Upload or insert images from URL.

    Sign in to follow this  

    • Recently Browsing   0 members

      No registered users viewing this page.

    Latest Topics

    Latest Comments

    • Create New...