[REQ] Environ map/Sun

[Doug Armand]

Simple request - can we have the option to use both the Sun and an environment map at the same time?

I have been playing around with Sketchup/Skindigo recently purely because I found out that you can do this with that combo so we know it can be done

Would be so helpful in setting up realistic outdoor scenes.

[ninopiamonte]

yeah, me too.
I use Sketchup and i'd like also to have that combination
of Environment Map + Sun....
...................................hope they add it to next release.

[dougal2]

I'm planning to overhaul the lighting options so that you can easily mix different sources, but I'm hoping Glare can fix one or two related bugs in Indigo itself first. But even if they don't, I'll be looking at this very issue this week anyway.

[Doug Armand]

Thats brilliant Dougal - can't wait and thanks for the quick response

[dougal2]

I've got something that pretty much works here, but still need more testing to make sure no features are lost in the reshuffle.

[Doug Armand]

Looking interesting - when can we 'test' it?

[galinette]

Hello,

Is the XML code for adding two environments (sun+envmap) documented somewhere?

Etienne

[dougal2]

Hello,

Is the XML code for adding two environments (sun+envmap) documented somewhere?

Etienne

Not very well, I had to download an older version of Indigo (1.1.18) to get the old example scene background_material_test.igs and I also found a forum thread explaining the <sum> material.

There are two issues with this in 3.2.5 currently though:
1. The new captured-simulation for sunsky isn't recognised when used as a background material (render won't start with "unknown element Model in Sunsky" error)
2. Light layer assignments don't work properly

At the risk of thinning the documentation even more, my self-made reference looks like this:

Code: Select all

	<material>
		<name>background_exr_A</name>
		<diffuse>
			<texture>
				<path>E:\RenderStuff\HDR\Dosch Industrial 2\EXR-SX\INDREF-001SX.exr</path>
				<exponent>1.0</exponent>
				<tex_coord_generation>
					<spherical>
						<rotation>
							<axis_rotation>
								<axis>0 0 1</axis>
								<angle>1.6</angle>
							</axis_rotation>
						</rotation>
					</spherical>
				</tex_coord_generation>
			</texture>
			<base_emission>
				<constant>
					<uniform><value>1.0</value></uniform>
				</constant>
			</base_emission>
			<emission>
				<texture>
					<texture_index>0</texture_index>
				</texture>
			</emission>
			<layer>0</layer>
		</diffuse>
	</material>

	<material>
		<name>SunShapeA</name>
		<sunsky>
			<sundir>-0.5 -0.5 0.7071067812</sundir>
			<turbidity>2</turbidity>
			<sun_layer>1</sun_layer>
			<sky_layer>2</sky_layer>
		</sunsky>
	</material>

	<material>
		<name>BGConst</name>
		<diffuse>
			<albedo_spectrum>
				<uniform><value>0</value></uniform>
			</albedo_spectrum>
			<base_emission>
				<constant>
					<rgb>
						<rgb>0.8 0.2 0.8</rgb>
						<gamma>1.0</gamma>
					</rgb>
				</constant>
			</base_emission>
			<layer>3</layer>
		</diffuse>
	</material>

	<background_settings>
		<background_material>
			<material>
				<name>background_material</name>
				<sum>
					<mat>
						<mat_name>background_exr_A</mat_name>
						<weight><constant>1</constant></weight>
					</mat>
					<mat>
						<mat_name>SunShapeA</mat_name>
						<weight><constant>1</constant></weight>
					</mat>
					<mat>
						<mat_name>BGConst</mat_name>
						<weight><constant>1</constant></weight>
					</mat>
				</sum>
			</material>
		</background_material>
	</background_settings>

[Doug Armand]

Any update on this Dougal - this would be a really useful feature for me.

[dougal2]

It's already in the latest version. Just use a sun and hemi lamp at the same time.

[Doug Armand]

Wow so it is!. Took me a while to work it out but seems to be working fine - many thanks for that Dougal