Switching from GPU to CPU gives different results

[devin]

I'm new to Vantage so forgive this question if the answer is obvious, when I send a scene to Vantage and it switches the render ending from CPU to GPU everything generally looks correct although it is usually a bit over exposed. When I switch the engine back to CPU and render my scene it's overexposed and looks totally different. The attached images are an example of this, all I did was export the Vantage scene and then switch the render engine from GPU to CPU.

[Alexander.Atanasov]

Hi devin,

Does the result in Vantage match the result when rendering with V-Ray GPU? What is the color space of the VFB set to because Vantage renders in sRGB colors.

Best regards,
Alexander

[devin]

No the Vray GPU result is overexposed and saturated while the Vantage image is very close to what the CPU engine renders.

Ok so apparently switching from CPU to GPU changes my color mapping settings from Exponential to Reinhard so that explains why it looks so different. Why does it do that?

[npg]

I would guess that since V-Ray CPU and V-Ray GPU are separate engines, each keeps its own settings (and the default is Reinhard).

[vladimir.nedev]

Ok so apparently switching from CPU to GPU changes my color mapping settings from Exponential to Reinhard so that explains why it looks so different. Why does it do that?

The render settings are reset each time you switch the current "Renderer".
This is V-Ray/3dsMax behavior (not sure which one).

Unfortunately, Vantage needs to switch to the GPU engine for the live link,
so you get this side effect of the settings being reset.

Greetings,
Vladimir Nedev