Clouds behind transparent part

[stdam]

I did this render:


I have these clouds of the material at the bottom of the transparent when it's on a non transparent material.
How can I fix this?

When I let Keyshot relax I took this screenshot:


no clouds but bad shadows.

Please help. Thanks in advance.

[JeffM]

To smooth out the first image's "clouds" you will need to increase the "global illumination quality" setting in the quality tab of the render menu. Try a setting of 3.

Or, to fix the shadow in the realtime screenshot, increase the "shadow quality" in the "realtime" tab of the options menu. Another way to affect the ground shadow quality is the "ground size" option in the "environment" tab. This setting is only shown when you have the "show advanced options" enabled in the preferences menu.

I hope that helps!

[stdam]

The global illumination quality setting was already 3. I made it 5 but I haven't any improvement. I think that the "ray bounces" setting was the right setting.

The shadow quality worked but with screenshot I don't have the same control of the picture size.

I will do some "test and error" and I will post the final pic.

Thanks

[m2tts]

I too get artifacts sometimes when using transparent materials. i usually use the "realtime" renderer for these shots as it never shows these artifacts. Their is a check box at bottom of the Render dialog to enable this. This will use the engine that Keyshot uses for the realtime window, but allow you to set the render size. I find this engine to be much faster than using the raytracer with higher Global Illumination settings (that rarely solve the issue anyway).

[stdam]

ray bounces up to 35-50 did the job. Thanks for the help.

[Speedster]

Hi there- what is your Realtime Gamma setting?  It defaults (for now) to 1.3 or something.  Try kicking it up to between 1.8 and (best) 2.2.  You will have to adjust some stuff, but it's worth it.  Leave brightness and gamma at 1.0 in the environment tab.  Also, try "lifting" the model just a tiny tad from the ground plane.  It will still look like it's planted, but will soften the shadow.
Bill G

[stdam]

I too get artifacts sometimes when using transparent materials. i usually use the "realtime" renderer for these shots as it never shows these artifacts. Their is a check box at bottom of the Render dialog to enable this. This will use the engine that Keyshot uses for the realtime window, but allow you to set the render size. I find this engine to be much faster than using the raytracer with higher Global Illumination settings (that rarely solve the issue anyway).

very good trick. worked well.

@ speedster: I saw this tip about gamma in the webinars and I'm testing it. Thanks.

[guest84672]

The global illumination quality setting was already 3. I made it 5 but I haven't any improvement. I think that the "ray bounces" setting was the right setting.

The shadow quality worked but with screenshot I don't have the same control of the picture size.

I will do some "test and error" and I will post the final pic.

Thanks

You can control the image size using the realtime render mode:

Click on the the teapot in the main window.
Set your image size.
Check "realtime rendering".
Go to the quality tab.
Uncheck frames.
Check time.
Set your time (in seconds).

Click render.

KeyShot will now use the realtime renderer to create the final image. If your image looks good enough before it reaches the time limit you set, you can simply stop the rendering. Your image will be saved.