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Shader goes dark in viewer on right click and doesn't return

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fullmetalfilm

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Shader goes dark in viewer on right click and doesn't return

PostMon Dec 30, 2019 6:04 pm

I'm working my way through the training PDF for Fusion that Blackmagic provides. I've started playing with shaders. I drag a single Chrome shader node into the nodes. I click 1 to see it in the viewer. I see the default sphere showing the material. Right clicking and dragging or simply right clicking in the viewer makes the shader go dark as if the light in the viewer has been turned way down.

If I view the same node in viewer 2, I can see it lit up. Viewer 1 shows it dark. So this is a viewer issue, not something that is being changed on the node.

The viewer settings appear identical in both viewer 1 and 2, so I can't tell what the right click changes. I also can't figure out how to make it come back without deleting that node and re-adding it, at which point it appears lit in the viewers until I right click again.

[Correction: Deleting the node and re-adding it doesn't fix the issue. I'm now stuck with both viewers preview shaders darkened] (edited)

This isn't a huge issue because obviously I'm just previewing the shader in a default shape. Although it is inconvenient because I can't preview other shapes because that requires a right-click which turns the lights out.

Anyone seen this or have any suggestions how to fix it?

Thanks,

Mark.
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fullmetalfilm

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Re: Shader goes dark in viewer on right click and doesn't re

PostMon Dec 30, 2019 6:25 pm

Right clicking in the viewer and selecting to uncheck "Enable lighting" fixes this. I'm not sure why the initial right clicking caused the viewer to go dark after it was lit. Perhaps someone can explain this.
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xunile

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Re: Shader goes dark in viewer on right click and doesn't re

PostMon Dec 30, 2019 6:49 pm

Are you right-clicking and dragging or middle-clicking and dragging? On my system, right clicking does nothing but bring up a context menu. Middle-clicking and dragging changes where the light source is in the Material viewer.
Attachments
2019-12-30 (2).png
Right-click menu
2019-12-30 (2).png (317.67 KiB) Viewed 258 times
2019-12-30 (3).png
Middle-Click and dragged to the right
2019-12-30 (3).png (325.86 KiB) Viewed 258 times
2019-12-30 (4).png
Middle-Click and dragged to the left
2019-12-30 (4).png (351.23 KiB) Viewed 258 times
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fullmetalfilm

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Re: Shader goes dark in viewer on right click and doesn't re

PostMon Dec 30, 2019 7:14 pm

I'm actually on a trackpad and I'm clicking with both fingers which is a "secondary click" - basically a right click. I don't have a mouse, so no middle mouse button. I use modifiers with a two finger click or drag to get what I want e.g. holding shift and dragging both fingers moves my view around the object in a spherical pattern.
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xunile

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Re: Shader goes dark in viewer on right click and doesn't re

PostMon Dec 30, 2019 7:22 pm

It is the pinch to zoom function of your trackpad that causes the issue, I just tried it with the trackpad on my laptop, the same thing happened. I rarely use the trackpad on my laptop, I use a mouse with a scroll wheel, works much better.
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fullmetalfilm

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Re: Shader goes dark in viewer on right click and doesn't re

PostMon Dec 30, 2019 7:35 pm

Sorry about the demo mode thing. This illustrates the issue.

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xunile

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Re: Shader goes dark in viewer on right click and doesn't re

PostMon Dec 30, 2019 7:49 pm

You can try right-clicking, choose Lighting>Light Position and then one of the selections.
Attachments
2019-12-30 (5).png
2019-12-30 (5).png (727.01 KiB) Viewed 246 times
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fullmetalfilm

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Re: Shader goes dark in viewer on right click and doesn't re

PostMon Dec 30, 2019 8:09 pm

This really feels like a bug. Yes, when I change the lighting position, the light turns back on. But as soon as a click the trackpad in the viewer with both fingers the light turns out, until I select a new angle, at which point it turns on again.

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