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Messages - ynotsop

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Hey maru, I ran into another problem. I am currently trying to link up the sun's rotation with the HDRI but I don't have the "Coordinates" option under the Environment Texture Map in Parameter Wiring.

Any help is appreciated.

Okay so I figured out that this was happening because I had the CoronaOutput in the Environment slot instead of the bitmap itself.

I am trying to align Corona Sun with the sun in an HDRI but I ran into a strange problem. When I put the HDRI in the Environment slot and use it as the environment background in my viewport the HDRI is rotated 90 degrees however the render displays the HDRI correctly. This has probably more to do with 3ds Max than Corona but maybe someone here can help me out.

Please see the attached image.

As you can see the interactive render is showing the HDRI correctly but in the perspective viewport it is showing the floor of the HDRI.

It seems like the exposure of the backplate image resets once I click on something random. I guess this sends Corona interactive the signal to update the render and thus reset the exposure. So everything is working as it should.

I have two poly objects (walls) in my scene which have the same material applied. I have a UVW map on both of them with the map channel the same as the material's/maps. When I render the scene the light shadow breaks differently on these two objects. Please see the attached images. I created the first object earlier today, made the material and just now created the second object and applied the same material.

I have the RGB Level set to 0.3 in the Normal bump map of my material which creates a soft shadow on my first object. If I set it to 1.0 the shadow becomes sharp just like in the second object.
However with the exactly same material applied, the second object always has a hard shadow projected on to it even with the RGB Level set to 0.3.

I cant' figure out what is going on here, the object themselves have the same Object properties and are placed on the same position.

There is also another problem with the second object. The top right area where the light hits it is always overexposed even if I bring the RGB Level of the Diffuse map to 0.5 (third picture). With the same material applied on my second and newly made objects (walls) the reflections on my main object (car) become overexposed. It really messes it up. I am using Corona Sun.

1.jpg - first object
2.jpg - second object
3.jpg - second object overexposed (Diffuse RGB 0.5)

Thanks for the help.

So I have the "Affected by Corona VFB.." unchecked in the output map of my backplate. However if I increase or decrease the exposure in Camera:Post processing the backplate's exposure is still being affected. Why is this happening?

With regards to the overexposure problem it seems like there was some sort of a glitch. I've tried the same setup on another simple scene and there was no exposure reset. When I opened my working file today everything is working as it should, the exposure is not resetting.

About my first problem. Is there any way to set up Corona or/with 3ds Max in a way that I can adjust the exposure of my object without affecting the exposure of the backplate?

Not sure if I am doing something wrong or if this issue has already been resolved. I have a scene with an object and a backplate set up. I need to match the sun/object's exposure to the backplate. I created Corona Sun and added the skylight map into corona environment slot. My object immediately becomes overexposed. If I change the exposure in Corona render window to -6.0 I get a fairly normal looking object with appropriate exposure. (like this person here

The first problem is that my backplate (obviously) also changes its exposure to -6.0 and now I can't match the two exposures (the object and the backplate).

The second problem is that after I change the exposure to -6.0 and then edit any kind of parameter either in Corona Sky or in the Corona Skylight map the exposure of my object jumps back to it's original overexposed value. I then have to set my global exposure to -12 to get the correct exposure again and so forth. It's impossible to work like this.

I've tried using Corona Output to regulate the exposure of the Skylight map but I get completely different and incorrect exposure.

If I use 3ds Max's sun system everything seems to work fine.

I hope someone can help me with this issue. Thank you so much.

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